Beam Diagnostics, Low Level RF and Feedback for Room Temperature FELs. Josef Frisch Pohang, March 14, 2011
|
|
- Kathryn Gordon
- 5 years ago
- Views:
Transcription
1 Beam Diagnostics, Low Level RF and Feedback for Room Temperature FELs Josef Frisch Pohang, March 14, 2011
2 Room Temperature / Superconducting Very different pulse structures RT: single bunch or short bursts SC: Long bursts or CW RT: ~100 bunches / second SC: ~10,000 bunches / second Data collection and processing RT machines usually accumulate data for an entire train before processing SC machines process within bunch train SC accelerator looks a lot like a ring from a diagnostics, LLRF, and feedback perspective Diagnostics and LLRF sensors, actuators and analog systems can be similar but Digital systems and software are very different! 8ms Room Temperature Single bunch Multi bunch Train <400ns total Superconducting 100ms Multi bunch train, 10ms 3MHz bunch rate CW operation, MHz bunch rate Slide 2
3 Types of Beam Diagnostics Diagnostics for feedback. Continuous operation High Reliability Beam Position Monitors, Bunch Length Monitors Diagnostics for tuning Profile Monitors, Wire Scanners, Transverse Cavities Diagnostics for machine physics Transverse cavities, X-ray spectrometers, COTR spectrometers, etc. Focus of this talk Slide 3
4 Beam Position Monitors: Striplines Well understood technology 5um RMS resolution at 250pC Use conventional designs unless there are special requirements Requires good RF engineering! Very different from storage ring BPMS Single shot broadband, not narrowband Low average data rate 3 out of 4 channels shown Variable Attenuator Variable Attenuator Digitizer cross coupling Band pass Amplifier Amplifier Variable Attenuator Variable Attenuator Digitizer Calibrate Signal Variable Attenuator Variable Attenuator Digitizer Slide 4
5 Beam Position Monitors: Cavities Better resolution than striplines Theoretical resolution 1nm at 1nC Practical limitations (mechanical mounting, dynamic range etc) limit typical resolution to 100nm. 10nm demonstrated at More complex and expensive than striplines Axis Cavity Variable Attenuator Mixer Digitizer Local Oscillator Vector division in software to get position Reference Cavity Variable Attenuator Mixer Digitizer Slide 5
6 Bunch Length Monitors Absolute bunch length measurement requires transverse cavities Resolution limited to ~10fs Spectral bunch length monitors can provide approximate bunch lengths Measurements are invasive, can t be used for feedback Relative bunch length monitors based on total radiated power in some band. Can use diffraction, synchrotron, or edge radiation. Pyroelectric detectors have sufficient sensitivity, single pulse response Bunch length monitor using edge radiation and pyro detectors Mm-wave filters used to reduce sensitivity to beam horns Bunch length monitor using high frequency RF diodes (BC1) Slide 6
7 Low Level RF Systems Control and measure the high power RF systems Waveform shaping for SLED and other applications Correct drifts and nonlinearities in high power systems Used for feedback from both RF and Beam information Different for RT and SC Accelerators RT: typically no feedback within pulse Simple digital control electronics and software Low average data rate High RF bandwidth ~10MHz SC: Need feedback within pulse to lock to high Q SC cavities Typically use programmable logic (Xilinx) for real-time feedback High average data throughput during pulse. Modest RF bandwidth ~100 KHz SC type systems may not be appropriate for room temperature RF. Slide 7
8 Generic LLRF System RF Reference I / Q Modulator KW Driver Amplifier High power RF Fast waveform generator Low power pickoff Mixer Beam Data Software: Feedback, RF and Beam data Software: decode phase and amplitude Transient Digitizer Slide 8
9 LLRF: Medium Power RF control In some accelerators (including SLAC) phase and amplitude control is done at ~KW power Cost tradeoff needs careful evaluation LLRF Drive 10KW Driver Amplifier KW power drive line Other stations Fast control of a group of stations Slow control of differences ΔΦ Mechanical ΔA LLRF Readout High power RF Slide 9
10 Feedback Functions Reduce Noise and Drift Will always amplify high frequency noise Design depends on noise spectrum Often low bandwidth is OK At LCLS / SLAC not much noise above 1Hz that isn t random shot to shot. Isolate parts of the accelerator Upstream changes corrected by feedbacks Improves tuning Reduces effects of klystron cycling etc. Provides orthogonal controls Can change beam compression without changing energy Valuable for understanding performance vs. single parameters Slide 10
11 LCLS Longitudinal Feedbacks Energy and bunch length feedbacks Act as 6 independent loops In principal possible to combine into a single loop, but the matricies depend on the operating conditions (compression) gun V 0 d 0 s z1 s z2 1 V 1 d 1 d 2 2 V 2 d 3 V 3 Linac X Linac Linac DL1 BC1 BC2 DL2 Slide 11
12 LCLS Transverse Feedbacks Multiple loops, each with multiple BPMS, 2 X/Y corrector pairs Most low rate / low gain, LTU runs at high rate Undulator uses cavity BPMS to stabilize orbit 1 to 10 Beam Position Monitors (BPMs) gun 2 or 4 corrector magnets example Injector L2 L3 LTU Undulator LTU Feedback : stabilizes beam for jitter frequencies < 120Hz rep-rate Slide 12
13 120Hz Operation and timeslots US power line frequency is 60Hz LCLS operates at 120Hz Modulator voltages, ambient magnetic fields, etc. have 2 states. Use main and difference feedbacks Feedback Sum Fast Actuator BPM Data Switch Average Difference Feedback Data Switch Slide 13
14 Feedback Software LCLS_I Basic algorithms operate as originally designed Software layer to convert LLRF amplitude and phase -> in-phase and out-of-phase components Feedback uses in-phase to control energy, out-of-phase to control compression Most effort on feedback development was for handing errors, beam loss and other special conditions Feedbacks prototyped in Matlab: allows rapid modification of code Now being converted to real-time system for faster performance Feedbacks operate independently Ideally would combing into a single more complex feedback. Difficult not clear if this is worth the effort. Slide 14
15 LCLS_I Automated Operation LINAC Energy Management: Adjust quad strengths when klystron complement changes Matching Adjust quads based on measured beam parameters Energy Change Adjust klystron complement and magnets to change beam energy Works well for small energy changes Large changes often require additional tuning. Charge changes 250pc, 150pc, 80pc, 40pc, 20pc Need configuration changes Require different source laser aperture, bunch length monitor Automation reduces chance of operators missing something Photon energy change by users being tested Slide 15
16 Comments Diagnostics, LLRF and Feedbacks form a single integrated system Superconducting and Room Temperature systems have very different requirements Some technology may transfer, some will not. LCLS Feedback system worked nearly as designed Lots of technical issues. General concept probably a good starting point for the design of other RT FELs. Slide 16
Feedback Requirements for SASE FELS. Henrik Loos, SLAC IPAC 2010, Kyoto, Japan
Feedback Requirements for SASE FELS Henrik Loos, SLAC, Kyoto, Japan 1 1 Henrik Loos Outline Stability requirements for SASE FELs Diagnostics for beam parameters Transverse: Beam position monitors Longitudinal:
More informationELECTRON BEAM DIAGNOSTICS AND FEEDBACK FOR THE LCLS-II*
THB04 Proceedings of FEL2014, Basel, Switzerland ELECTRON BEAM DIAGNOSTICS AND FEEDBACK FOR THE LCLS-II* Josef Frisch, Paul Emma, Alan Fisher, Patrick Krejcik, Henrik Loos, Timothy Maxwell, Tor Raubenheimer,
More informationBeam Arrival Time Monitors. Josef Frisch, IBIC Sept. 15, 2015
Beam Arrival Time Monitors Josef Frisch, IBIC Sept. 15, 2015 Arrival Time Monitors Timing is only meaningful relative to some reference, and in general what matters is the relative timing of two different
More informationFLASH at DESY. FLASH. Free-Electron Laser in Hamburg. The first soft X-ray FEL operating two undulator beamlines simultaneously
FLASH at DESY The first soft X-ray FEL operating two undulator beamlines simultaneously Katja Honkavaara, DESY for the FLASH team FEL Conference 2014, Basel 25-29 August, 2014 First Lasing FLASH2 > First
More informationLow-Level RF. S. Simrock, DESY. MAC mtg, May 05 Stefan Simrock DESY
Low-Level RF S. Simrock, DESY Outline Scope of LLRF System Work Breakdown for XFEL LLRF Design for the VUV-FEL Cost, Personpower and Schedule RF Systems for XFEL RF Gun Injector 3rd harmonic cavity Main
More informationRF Locking of Femtosecond Lasers
RF Locking of Femtosecond Lasers Josef Frisch, Karl Gumerlock, Justin May, Steve Smith SLAC Work supported by DOE contract DE-AC02-76SF00515 1 Overview FEIS 2013 talk discussed general laser locking concepts
More informationLCLS Injector Diagnostics. Henrik Loos. Diagnostics overview Transverse Beam Properties Longitudinal Beam Properties
Diagnostics overview Transverse Beam Properties Longitudinal Beam Properties LCLS Diagnostics Tasks Charge Toroids (Gun, Inj, BC, Und) Faraday cups (Gun & Inj) Trajectory & energy Stripline BPMs (Gun,
More informationSub-ps (and sub-micrometer) developments at ELETTRA
Sub-ps (and sub-micrometer) developments at ELETTRA Mario Ferianis SINCROTRONE TRIESTE, Italy The ELETTRA laboratory ELETTRA is a 3 rd generation synchrotron light source in Trieste (I) since 1993 up to
More informationBEAM ARRIVAL TIME MONITORS
BEAM ARRIVAL TIME MONITORS J. Frisch SLAC National Accelerator Laboratory, Stanford CA 94305, USA Abstract We provide an overview of beam arrival time measurement techniques for FELs and other accelerators
More informationFemtosecond Synchronization of Laser Systems for the LCLS
Femtosecond Synchronization of Laser Systems for the LCLS, Lawrence Doolittle, Gang Huang, John W. Staples, Russell Wilcox (LBNL) John Arthur, Josef Frisch, William White (SLAC) 26 Aug 2010 FEL2010 1 Berkeley
More informationAdvanced Beam Instrumentation and Diagnostics for FELs
Advanced Beam Instrumentation and Diagnostics for FELs P. Evtushenko, Jefferson Lab with help and insights from many others: S. Benson, D. Douglas, Jefferson Lab T. Maxwell, P. Krejcik, SLAC S. Wesch,
More informationFLASH Operation at DESY From a Test Accelerator to a User Facility
FLASH Operation at DESY From a Test Accelerator to a User Facility Michael Bieler FLASH Operation at DESY WAO2012, SLAC, Aug. 8, 2012 Vocabulary DESY: Deutsches Elektronen-Synchrotron, Hamburg, Germany
More informationEUROFEL-Report-2006-DS EUROPEAN FEL Design Study
EUROFEL-Report-2006-DS3-034 EUROPEAN FEL Design Study Deliverable N : D 3.8 Deliverable Title: RF Amplitude and Phase Detector Task: Author: DS-3 F.Ludwig, M.Hoffmann, M.Felber, Contract N : 011935 P.Strzalkowski,
More informationTHz Pump Beam for LCLS. Henrik Loos. LCLS Hard X-Ray Upgrade Workshop July 29-31, 2009
Beam for LCLS Henrik Loos Workshop July 29-31, 29 1 1 Henrik Loos Overview Coherent Radiation Sources Timing THz Source Performance 2 2 Henrik Loos LCLS Layout 6 MeV 135 MeV 25 MeV 4.3 GeV 13.6 GeV σ z.83
More informationNonintercepting Diagnostics for Transverse Beam Properties: from Rings to ERLs
Nonintercepting Diagnostics for Transverse Beam Properties: from Rings to ERLs Alex H. Lumpkin Accelerator Operations Division Advanced Photon Source Presented at Jefferson National Accelerator Laboratory
More informationDiagnostics for Free Electron Lasers. Josef Frisch
Diagnostics for Free Electron Lasers Josef Frisch Were you involved with LCLS lasing or did you only do the diagnostics? Can't construct a FEL with sufficient accuracy to allow it to lase when you turn
More informationPerformance Evaluation of the Upgraded BAMs at FLASH
Performance Evaluation of the Upgraded BAMs at FLASH with a compact overview of the BAM, the interfacing systems & a short outlook for 2019. Marie K. Czwalinna On behalf of the Special Diagnostics team
More informationRF-based Synchronization of the Seed and Pump-Probe Lasers to the Optical Synchronization System at FLASH
RF-based Synchronization of the Seed and Pump-Probe Lasers to the Optical Synchronization System at FLASH Introduction to the otical synchronization system and concept of RF generation for locking of Ti:Sapphire
More informationPerformance of the Prototype NLC RF Phase and Timing Distribution System *
SLAC PUB 8458 June 2000 Performance of the Prototype NLC RF Phase and Timing Distribution System * Josef Frisch, David G. Brown, Eugene Cisneros Stanford Linear Accelerator Center, Stanford University,
More informationHIGHER ORDER MODES FOR BEAM DIAGNOSTICS IN THIRD HARMONIC 3.9 GHZ ACCELERATING MODULES *
HIGHER ORDER MODES FOR BEAM DIAGNOSTICS IN THIRD HARMONIC 3.9 GHZ ACCELERATING MODULES * N. Baboi #, N. Eddy, T. Flisgen, H.-W. Glock, R. M. Jones, I. R. R. Shinton, and P. Zhang # # Deutsches Elektronen-Synchrotron
More informationA high resolution bunch arrival time monitor system for FLASH / XFEL
A high resolution bunch arrival time monitor system for FLASH / XFEL K. Hacker, F. Löhl, F. Ludwig, K.H. Matthiesen, H. Schlarb, B. Schmidt, A. Winter October 24 th Principle of the arrival time detection
More informationFemtosecond-stability delivery of synchronized RFsignals to the klystron gallery over 1-km optical fibers
FEL 2014 August 28, 2014 THB03 Femtosecond-stability delivery of synchronized RFsignals to the klystron gallery over 1-km optical fibers Kwangyun Jung 1, Jiseok Lim 1, Junho Shin 1, Heewon Yang 1, Heung-Sik
More informationINSTALLATION AND FIRST COMMISSIONING OF THE LLRF SYSTEM
INSTALLATION AND FIRST COMMISSIONING OF THE LLRF SYSTEM FOR THE EUROPEAN XFEL Julien Branlard, for the LLRF team TALK OVERVIEW 2 Introduction Brief reminder about the XFEL LLRF system Commissioning goals
More informationPhysics Requirements Document Document Title: SCRF 1.3 GHz Cryomodule Document Number: LCLSII-4.1-PR-0146-R0 Page 1 of 7
Document Number: LCLSII-4.1-PR-0146-R0 Page 1 of 7 Document Approval: Originator: Tor Raubenheimer, Physics Support Lead Date Approved Approver: Marc Ross, Cryogenic System Manager Approver: Jose Chan,
More informationPredictions of LER-HER limits
Predictions of LER-HER limits PEP-II High Current Performance T. Mastorides, C. Rivetta, J.D. Fox, D. Van Winkle Accelerator Technology Research Div., SLAC 2e 34 Meeting, May 2, 27 Contents In this presentation
More informationHOM Based Diagnostics at the TTF
HOM Based Diagnostics at the TTF Nov 14, 2005 Josef Frisch, Nicoleta Baboi, Linda Hendrickson, Olaf Hensler, Douglas McCormick, Justin May, Olivier Napoly, Rita Paparella, Marc Ross, Claire Simon, Tonee
More informationCavity Field Control - RF Field Controller. LLRF Lecture Part3.3 S. Simrock, Z. Geng DESY, Hamburg, Germany
Cavity Field Control - RF Field Controller LLRF Lecture Part3.3 S. Simrock, Z. Geng DESY, Hamburg, Germany Content Introduction to the controller Control scheme selection In-phase and Quadrature (I/Q)
More informationUsing Higher Order Modes in the Superconducting TESLA Cavities for Diagnostics at DESY
Using Higher Order Modes in the Superconducting TESLA Cavities for Diagnostics at FLASH @ DESY N. Baboi, DESY, Hamburg for the HOM team : S. Molloy 1, N. Baboi 2, N. Eddy 3, J. Frisch 1, L. Hendrickson
More informationOrbit Stability Challenges for Storage Rings. Glenn Decker Advanced Photon Source Beam Diagnostics March 8, 2012
Orbit Stability Challenges for Storage Rings Glenn Decker Advanced Photon Source Beam Diagnostics March 8, 2012 Outline Beam stability requirements RF beam position monitor technology NSLS II developments
More informationLinac Coherent Light Source (LCLS) Low Level RF Status LCLS FAC. October 30, 2007
Linac Coherent Light Source (LCLS) Low Level RF Status LCLS Emma LCLS RF Gun, L0, and L1 Emma Dual Feed L0A L0B L0A 57MV 19MV/m L0B 72MV 24MV/m Off Axis Injector Vault Injector Transverse Accelerator 55cm
More informationDemonstration of exponential growth and saturation at VUV wavelengths at the TESLA Test Facility Free-Electron Laser. P. Castro for the TTF-FEL team
Demonstration of exponential growth and saturation at VUV wavelengths at the TESLA Test Facility Free-Electron Laser P. Castro for the TTF-FEL team 100 nm 1 Å FEL radiation TESLA Test Facility at DESY
More informationFLASH performance after the upgrade. Josef Feldhaus
FLASH performance after the upgrade Josef Feldhaus European XFEL / HASYLAB Users Meeting DESY, January 27, 2011 Upgrade 2009 / 2010 > Upgrade shutdown: September 2009 February 2010 exchanged RF stations
More informationPerformance of the TTF Photoinjector Laser System
Performance of the TTF Photoinjector Laser System S. Schreiber, DESY Laser Issues for Electron Photoinjectors, October 23-25, 22, Stanford, California, USA & I. Will, A. Liero, W. Sandner, MBI Berlin Overview
More informationALICE SRF SYSTEM COMMISSIONING EXPERIENCE A. Wheelhouse ASTeC, STFC Daresbury Laboratory
ALICE SRF SYSTEM COMMISSIONING EXPERIENCE A. Wheelhouse ASTeC, STFC Daresbury Laboratory ERL 09 8 th 12 th June 2009 ALICE Accelerators and Lasers In Combined Experiments Brief Description ALICE Superconducting
More informationReview on Progress in RF Control Systems. Cornell University. Matthias Liepe. M. Liepe, Cornell U. SRF 2005, July 14
Review on Progress in RF Control Systems Matthias Liepe Cornell University 1 Why this Talk? As we all know, superconducting cavities have many nice features one of which is very high field stability. Why?
More informationBorut Baricevic. Libera LLRF. 17 September 2009
Borut Baricevic Libera LLRF borut.baricevic@i-tech.si 17 September 2009 Outline Libera LLRF introduction Libera LLRF system topology Signal processing structure GUI and signal acquisition RF system diagnostics
More informationtaccor Optional features Overview Turn-key GHz femtosecond laser
taccor Turn-key GHz femtosecond laser Self-locking and maintaining Stable and robust True hands off turn-key system Wavelength tunable Integrated pump laser Overview The taccor is a unique turn-key femtosecond
More informationR&D Toward Brighter X-ray FELs
Some R&D Toward Brighter X-ray FELs Zhirong Huang (SLAC) March 6, 2012 FLS2012 Workshop, Jefferson Lab Outline Introduction Seeding for temporal coherence Hard x-rays Soft x-rays Push for higher power
More informationTHE ORION PHOTOINJECTOR: STATUS and RESULTS
THE ORION PHOTOINJECTOR: STATUS and RESULTS Dennis T. Palmer SLAC / ARDB ICFA Sardinia 4 July 2002 1. Introduction 2. Beam Dynamics Simulations 3. Photoinjector 1. RF Gun 2. Solenoidal Magnet 3. Diagnostics
More informationSynchronization Overview
Synchronization Overview S. Simrock, DESY ERL Workshop 2005 Stefan Simrock DESY What is Synchronization Outline Synchronization Requirements for RF, Laser and Beam Timing stability RF amplitude and phase
More informationRF System Models and Longitudinal Beam Dynamics
RF System Models and Longitudinal Beam Dynamics T. Mastoridis 1, P. Baudrenghien 1, J. Molendijk 1, C. Rivetta 2, J.D. Fox 2 1 BE-RF Group, CERN 2 AARD-Feedback and Dynamics Group, SLAC T. Mastoridis LLRF
More informationStatus, perspectives, and lessons from FLASH and European XFEL
2014 International Workshop on EUV and Soft X-ray Sources November 3-6, 2014 Dublin, Ireland Status, perspectives, and lessons from FLASH and European XFEL R. Brinkmann, E.A. Schneidmiller, J, Sekutowicz,
More informationWisconsin FEL Initiative
Wisconsin FEL Initiative Joseph Bisognano, Mark Bissen, Robert Bosch, Michael Green, Ken Jacobs, Hartmut Hoechst, Kevin J Kleman, Robert Legg, Ruben Reininger, Ralf Wehlitz, UW-Madison/SRC William Graves,
More informationPower. Warranty. 30 <1.5 <3% Near TEM ~4.0 one year. 50 <1.5 <5% Near TEM ~4.0 one year
DL CW Blue Violet Laser, 405nm 405 nm Operating longitudinal mode Several Applications: DNA Sequencing Spectrum analysis Optical Instrument Flow Cytometry Interference Measurements Laser lighting show
More informationINTRA-TRAIN LONGITUDINAL FEEDBACK FOR BEAM STABILIZATION AT FLASH
INTRA-TRAIN LONGITUDINAL FEEDBACK FOR BEAM STABILIZATION AT FLASH W. Koprek*, C. Behrens, M. K. Bock, M. Felber, P. Gessler, K. Hacker, H. Schlarb, C. Schmidt, B. Steffen, S. Wesch, DESY, Hamburg, Germany
More informationNote on the LCLS Laser Heater Review Report
Note on the LCLS Laser Heater Review Report P. Emma, Z. Huang, C. Limborg, J. Schmerge, J. Wu April 15, 2004 1 Introduction This note compiles some initial thoughts and studies motivated by the LCLS laser
More informationOperating longitudinal mode Several Polarization ratio > 100:1. Power. Warranty. 30 <1.5 <5% Near TEM ~4.0 one year
DL CW Blue Violet Laser, 405nm 405 nm Operating longitudinal mode Several Applications: DNA Sequencing Spectrum analysis Optical Instrument Flow Cytometry Interference Measurements Laser lighting show
More informationFLASH rf gun. beam generated within the (1.3 GHz) RF gun by a laser. filling time: typical 55 μs. flat top time: up to 800 μs
The gun RF control at FLASH (and PITZ) Elmar Vogel in collaboration with Waldemar Koprek and Piotr Pucyk th FLASH Seminar at December 19 2006 FLASH rf gun beam generated within the (1.3 GHz) RF gun by
More informationLLRF Operation and Performance of the European XFEL. An overview
LLRF Operation and Performance of the European XFEL. An overview Mathieu Omet LLRF, Barcelona, 16.10.2017 Contents > Introduction > LLRF commissioning > Energy Reach > LLRF performance > Summary / Outlook
More informationSession 3 Summary: Orbit Feedback
Session 3 Summary: Orbit Feedback Workshop on Ambient Ground Motion and Vibration Suppression for Low Emittance Storage Rings GM2017 12/13/2017 MMS System Design, Initial Results and Experiments with Orbit
More informationAcceleration of High-Intensity Protons in the J-PARC Synchrotrons. KEK/J-PARC M. Yoshii
Acceleration of High-Intensity Protons in the J-PARC Synchrotrons KEK/J-PARC M. Yoshii Introduction 1. J-PARC consists of 400 MeV Linac, 3 GeV Rapid Cycling Synchrotron (RCS) and 50 GeV Main synchrotron
More informationParticipant institutions: other INFN sections (Mi, RM1, RM2, Ba, Ca, Pi, Ts, Fe, Le, Fi, Na, LNS), ENEA-Frascat
The THOMSON SOURCE AT SPARC_LAB C. Vaccarezza (Resp. Naz.), M.P. Anania (Ass. Ric.), M. Bellaveglia (Art. 23), M. Cestelli Guidi (Art. 23), D. Di Giovenale (Art. 23) G. Di Pirro, A. Drago, M. Ferrario,
More informationDrive Beam Photo-injector Option for the CTF3 Nominal Phase
CTF3 Review Drive Beam Photo-injector Option for the CTF3 Nominal Phase Motivation CTF3 Drive Beam Requirements CTF3 RF gun design The Laser (I. Ross / RAL) The Photocathode Cost estimate Possible schedule
More informationSYNCHRONIZATION SYSTEMS FOR ERLS
SYNCHRONIZATION SYSTEMS FOR ERLS Stefan Simrock, Frank Ludwig, Holger Schlarb DESY Notkestr. 85, 22603 Hamburg News, Germany Corresponding author: Stefan Simrock DESY Notkestr. 85 22603 Hamburg, Germany
More informationCLARA: A new particle accelerator test facility for the UK
CLARA: A new particle accelerator test facility for the UK Jim Clarke STFC Daresbury Laboratory and The Cockcroft Institute on behalf of the CLARA & VELA Project Teams RHUL Particle Physics Seminar, 25
More informationFLASH: Status and upgrade
: Status and upgrade The User Facility Layout Performance and operational o a issues Upgrade Bart Faatz for the team DESY FEL 2009 Liverpool, UK August 23-28, 2009 at DESY > FEL user facility since summer
More informationAttosecond Diagnostics of Muti GeV Electron Beams Using W Band Deflectors
Attosecond Diagnostics of Muti GeV Electron Beams Using W Band Deflectors V.A. Dolgashev, P. Emma, M. Dal Forno, A. Novokhatski, S. Weathersby SLAC National Accelerator Laboratory FEIS 2: Femtosecond Electron
More informationAvailable online at ScienceDirect. Physics Procedia 84 (2016 )
Available online at www.sciencedirect.com ScienceDirect Physics Procedia 84 (2016 ) 8 112 International Conference "Synchrotron and Free electron laser Radiation: generation and application", SFR-2016,
More informationX-Ray Detection Using SOI Monolithic Sensors at a Compact High-Brightness X-Ray Source Based on Inverse Compton Scattering
Abstract #: 1054 Conference: NSS (Oral) Accelerator Technologies and Beam Line Instrumentation X-Ray Detection Using SOI Monolithic Sensors at a Compact High-Brightness X-Ray Source Based on Inverse Compton
More informationLUCX - THZ PROGRAM: OVERVIEW AND PROSPECTS
LUCX - THZ PROGRAM: OVERVIEW AND PROSPECTS A. Aryshev On behalf of QB group and THz collaboration 14 Outline THz project overview LUCX activity LUCX Projects Overview THz program LUCX Laser system LUCX
More informationFLASH 2. FEL seminar. Charge: 0.5 nc. Juliane Rönsch-Schulenburg Overview of FLASH 2 Hamburg,
FLASH 2 FEL seminar Juliane Rönsch-Schulenburg Overview of FLASH 2 Hamburg, 2016-03-22 Charge: 0.5 nc Overview 1. FLASH 2 Overview 1.Layout parameters 2. Operation FLASH2. 1.Lasing at wavelengths between
More informationLLRF Plans for SMTF. Ruben Carcagno (Fermilab) Nigel Lockyer (University of Pennsylvania) Thanks to DESY, PISA, KEK, Fermilab, SLAC Colleagues
LLRF Plans for SMTF Ruben Carcagno (Fermilab) Nigel Lockyer (University of Pennsylvania) Thanks to DESY, PISA, KEK, Fermilab, SLAC Colleagues Outline Near-term (< 1.5 years) SMTF LLRF plan Long-term (>
More informationDirectly Chirped Laser Source for Chirped Pulse Amplification
Directly Chirped Laser Source for Chirped Pulse Amplification Input pulse (single frequency) AWG RF amp Output pulse (chirped) Phase modulator Normalized spectral intensity (db) 64 65 66 67 68 69 1052.4
More informationA Prototype Wire Position Monitoring System
LCLS-TN-05-27 A Prototype Wire Position Monitoring System Wei Wang and Zachary Wolf Metrology Department, SLAC 1. INTRODUCTION ¹ The Wire Position Monitoring System (WPM) will track changes in the transverse
More informationCoherent Synchrotron Radiation in the ANKA Storage Ring
Coherent Synchrotron Radiation in the ANKA Storage Ring Marcel Schuh On behalf of the ANKA THz-Group Laboratory for Applications of Synchrotron Radiation (LAS) / Institute of Synchrotron Radiation (ISS)
More informationDesign and performance of LLRF system for CSNS/RCS *
Design and performance of LLRF system for CSNS/RCS * LI Xiao 1) SUN Hong LONG Wei ZHAO Fa-Cheng ZHANG Chun-Lin Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China Abstract:
More informationSNS LLRF Design Experience and its Possible Adoption for the ILC
SNS LLRF Design Experience and its Possible Adoption for the ILC Brian Chase SNS - Mark Champion Fermilab International Linear Collider Workshop 11/28/2005 1 Why Consider the SNS System for ILC R&D at
More informationElectro-Optical Measurements at the Swiss Light Source (SLS) Linac at the PSI. First Results
Electro-Optical Measurements at the Swiss Light Source (SLS) Linac at the PSI First Results Overview motivation electro-optical sampling general remarks experimental setup synchronisation between TiSa-laser
More informationShort-Pulse X-ray at the Advanced Photon Source Overview
Short-Pulse X-ray at the Advanced Photon Source Overview Vadim Sajaev and Louis Emery Accelerator Operations and Physics Group Accelerator Systems Division Mini-workshop on Methods of Data Analysis in
More informationMULTI-BUNCH BEAM SIGNAL GENERATOR FOR FEEDBACK RECEIVER DEVELOPMENT*
Proceedings of IW08, Tahoe ity, alifornia MULTI-UNH EM SIGNL GENERTOR FOR FEEK REEIER EELOPMENT* Jiajing Xu, John. Fox, aniel an Winkle #, Stanford Linear ccelerator enter, Menlo Park, 91, U.S.. bstract
More informationEnergy Recovering Linac Issues
Energy Recovering Linac Issues L. Merminga Jefferson Lab EIC Accelerator Workshop Brookhaven National Laboratory February 26-27, 2002 Outline Energy Recovery RF Stability in Recirculating, Energy Recovering
More informationBunch-by-Bunch Broadband Feedback for the ESRF
Bunch-by-Bunch Broadband Feedback for the ESRF ESLS RF meeting / Aarhus 21-09-2005 J. Jacob, E. Plouviez, J.-M. Koch, G. Naylor, V. Serrière Goal: Active damping of longitudinal and transverse multibunch
More informationDrive Laser State-of-the-art: Performance, Stability and Programmable Repetition Rate The Jefferson Lab Experience
Drive Laser State-of-the-art: Performance, Stability and Programmable Repetition Rate The Jefferson Lab Experience Michelle Shinn ERL Workshop Jefferson Lab March 22, 2005 Work supported by, the Joint
More informationBeam Test Results of High Q CBPM prototype for SXFEL *
Beam Test Results of High Q CBPM prototype for SXFEL * Jian Chen ( 陈健 ),;) Yong-bin Leng ( 冷用斌 ) ;) Lu-yang Yu ( 俞路阳 ) Long-wei Lai ( 赖龙伟 ) Ren-xian Yuan ( 袁任贤 ) Shanghai Institute of Applied Physics,
More informationStatus on Pulsed Timing Distribution Systems and Implementations at DESY, FERMI and XFEL
FLS Meeting March 7, 2012 Status on Pulsed Timing Distribution Systems and Implementations at DESY, FERMI and XFEL Franz X. Kärtner Center for Free-Electron Laser Science, DESY and Department of Physics,
More informationC0da-r I&9 Commissioning Experience with the PEP-XI Low-Level RF System*
Cdar 9733 I&9 Commissioning Experience with the PEPXI LowLevel RF System* # SLACPUB753 f May 1997 (A) P. Corredoura, S. Allison, R. Claus, W. Ross, L. Sapozhnikov, H. D. Schwarz, R. Tighe, C. Yee, C. Ziomek
More informationC100 Cryomodule. Seven cell Cavity, 0.7 m long (high Q L ) 8 Cavities per Cryomodule Fits the existing Cryomodule footprint
1 new module C100 Cryomodule Seven cell Cavity, 0.7 m long (high Q L ) 8 Cavities per Cryomodule Fits the existing Cryomodule footprint Fundamental frequency f 0 Accelerating gradient E acc 1497 MHz >
More informationA Synchrotron Phase Detector for the Fermilab Booster
FERMILAB-TM-2234 A Synchrotron Phase Detector for the Fermilab Booster Xi Yang and Rene Padilla Fermi National Accelerator Laboratory Box 5, Batavia IL 651 Abstract A synchrotron phase detector is diagnostic
More informationSPEAR 3 - THE FIRST YEAR OF OPERATION*
SLAC-PUB-11679 SPEAR 3 - THE FIRST YEAR OF OPERATION* R. Hettel for the SSRL ASD, SSRL/SLAC, Stanford, CA 942, U.S.A. Abstract The first electrons were accumulated in the newly completed 3-GeV SPEAR 3
More informationPrecision RF Beam Position Monitors for Measuring Beam Position and Tilt Progress Report
Precision RF Beam Position Monitors for Measuring Beam Position and Tilt Progress Report UC Berkeley Senior Personnel Yury G. Kolomensky Collaborating Institutions Stanford Linear Accelerator Center: Marc
More informationDesign considerations for the RF phase reference distribution system for X-ray FEL and TESLA
Design considerations for the RF phase reference distribution system for X-ray FEL and TESLA Krzysztof Czuba *a, Henning C. Weddig #b a Institute of Electronic Systems, Warsaw University of Technology,
More informationHigh Power and Energy Femtosecond Lasers
High Power and Energy Femtosecond Lasers PHAROS is a single-unit integrated femtosecond laser system combining millijoule pulse energies and high average powers. PHAROS features a mechanical and optical
More informationThulium-Doped Fiber Amplifier Development for Power Scaling the 2 Micron Coherent Laser Absorption Instrument for ASCENDS
Thulium-Doped Fiber Amplifier Development for Power Scaling the 2 Micron Coherent Laser Absorption Instrument for ASCENDS Mark W. Phillips Lockheed Martin Coherent Technologies 135 South Taylor Avenue,
More informationDoes the short pulse mode need energy recovery?
Does the short pulse mode need energy recovery? Rep. rate Beam power @ 5GeV 1nC @ 100MHz 500MW Absolutely 1nC @ 10MHz 1nC @ 1MHz 50MW 5MW Maybe 1nC @ 100kHz 0.5MW No Most applications we have heard about
More informationAutomatic phase calibration for RF cavities using beam-loading signals. Jonathan Edelen LLRF 2017 Workshop (Barcelona) 18 Oct 2017
Automatic phase calibration for RF cavities using beam-loading signals Jonathan Edelen LLRF 2017 Workshop (Barcelona) 18 Oct 2017 Introduction How do we meet 10-4 energy stability for PIP-II? 2 11/9/2017
More informationSwissFEL Design and Status
SwissFEL Design and Status Hans H. Braun Mini Workshop on Compact X ray Free electron Lasers Eastern Forum of Science and Technology Shanghai July 19, 2010 SwissFEL, the next large facility at PSI SwissFEL
More informationDevelopment of a high-power coherent THz sources and THz-TDS system on the basis of a compact electron linac
Development of a high-power coherent THz sources and THz-TDS system on the basis of a compact electron linac Masafumi Kumaki A) Ryunosuke Kuroda B), Hiroyuki Toyokawa B), Yoshitaka Taira B), Kawakatsu
More informationSlide Title. Bulleted Text
Slide Title 1 Slide Outline Title Brief view of the C-AD Complex Review of the RHIC LLRF Upgrade Platform Generic Implementation of a Feedback Loop RHIC Bunch by Bunch Longitudinal Damper Cavity Controller
More informationMitigation Plans for the Microbunching-Instability-Related COTR at ASTA/FNAL
1 Mitigation Plans for the Microbunching-Instability-Related COTR at ASTA/FNAL 1.1.1 Introduction A.H. Lumpkin, M. Church, and A.S. Johnson Mail to: lumpkin@fnal.gov Fermi National Accelerator Laboratory,
More informationLCLS project update. John Arthur. LCLS Photon Systems Manager
LCLS project update LCLS Photon Systems Manager LCLS major construction nearly finished Technical systems turning on with good performance Experimental instruments Expectations for early operation First
More informationInfrared Single Shot Diagnostics for the Longitudinal. Profile of the Electron Bunches at FLASH. Disputation
Infrared Single Shot Diagnostics for the Longitudinal Profile of the Electron Bunches at FLASH Disputation Hossein Delsim-Hashemi Tuesday 22 July 2008 7/23/2008 2/ 35 Introduction m eb c 2 3 2 γ ω = +
More informationTECHNICAL CHALLENGES OF THE LCLS-II CW X-RAY FEL *
TECHNICAL CHALLENGES OF THE LCLS-II CW X-RAY FEL * T.O. Raubenheimer # for the LCLS-II Collaboration, SLAC, Menlo Park, CA 94025, USA Abstract The LCLS-II will be a CW X-ray FEL upgrade to the existing
More informationHigh Precision Orbit Stabilization In Future Light Sources
High Precision Orbit Stabilization In Future Light Sources Paul Scherrer Institute Contents / Disclaimer No comprehensive overview, but few selected aspects, topics & examples from author s field of work
More informationR.Bachimanchi, IPAC, May 2015, Richmond, VA
1 new module C100 Cryomodule Seven cell Cavity, 0.7 m long (high Q L ) 8 Cavities per Cryomodule Fits the existing Cryomodule footprint Fundamental frequency f 0 Accelerating gradient E acc 1497 MHz >
More informationProgress in High Gradient Accelerator Research at MIT
Progress in High Gradient Accelerator Research at MIT Presented by Richard Temkin MIT Physics and Plasma Science and Fusion Center May 23, 2007 MIT Accelerator Research Collaborators MIT Plasma Science
More informationDesign of S-band re-entrant cavity BPM
Nuclear Science and Techniques 20 (2009) 133 139 Design of S-band re-entrant cavity BPM LUO Qing SUN Baogen * HE Duohui National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology,
More informationBPMs with Precise Alignment for TTF2
BPMs with Precise Alignment for TTF2 D. Noelle, G. Priebe, M. Wendt, and M. Werner Deutsches Elektronen Synchrotron DESY, Notkestr. 85, D-22603 Hamburg, Germany Abstract. Design and technology of the new,
More informationDirect Digital Down/Up Conversion for RF Control of Accelerating Cavities
Direct Digital Down/Up Conversion for RF Control of Accelerating Cavities C. Hovater, T. Allison, R. Bachimanchi, J. Musson and T. Plawski Introduction As digital receiver technology has matured, direct
More informationIntroduction to the Physics of Free-Electron Lasers
Introduction to the Physics of Free-Electron Lasers 1 Outline Undulator Radiation Radiation from many particles The FEL Instability Advanced FEL concepts The X-Ray Free-Electron Laser For Angstrom level
More information5kW DIODE-PUMPED TEST AMPLIFIER
5kW DIODE-PUMPED TEST AMPLIFIER SUMMARY?Gain - OK, suggest high pump efficiency?efficient extraction - OK, but more accurate data required?self-stabilisation - Yes, to a few % but not well matched to analysis
More information