Volume VIII & IX Annual Refresher Training + =

Transcription

1 Volume VIII & IX Annual Refresher Training + =

2 LFORM 4 Procedural Compliance In the context of operating the OMEGA Laser Facility, including the tritium facility, the CTHS, and OMEGA EP, formal procedural compliance means: Only formally approved written procedures will be used to conduct shot and tritium operations. These procedures are contained in the applicable Operations Procedures Manuals for OMEGA, Volume II; CTHS, Volume V; and OMEGA EP, Volumes VIII and IX. If an error or omission that prevents continuing is noted in an Operation Procedure, the system will be placed in a safe state and the operation will be halted until a formal written change to the procedure is approved by the Laser Facility Manager or Cryogenic and Tritium Facility Manager (CTFM) as applicable. The System Operation Procedures will be referenced as required during operations. For Shot and Tritium Operations, the applicable procedures will be open and used as a check list by the Shot Director, Control Room, and CTHS Operators. For all other evolutions, e.g., system preoperational checks and startup, system shutdown, and maintenance operations, the procedure will be referenced as frequently as necessary to ensure compliance with the procedural requirements.

3 Vol VIII & IX contains the operational procedures used to run EP safely and effectively Following common procedures between all operators ensures: Repeatable and meaningful science results Streamlined operation of a very complicated system Decreased risk of errors/incidents High level of availability Shot Operations (Vol VIII) Shot Type Specific checklist (in the future more detailed explanations) Subsystem Startup & Shutdown (Vol IX) Pre-ops & Securing Hardware, Software, LASER startup and shutdown

4 OMEGA BO Shot Checklist Example:

5 EP BLO Shot Checklist Example: Intent document isn t written yet When the intent document is written, some of the extra information in the checklist will be removed.

6 Main Beamline Setup - Options 2 Pass or 4 Pass Short-Pulse or Long-Pulse SP-Pols in or out PEPC Single pulse Double pulse What does this all mean? How does it affect main beamline alignment?

7 Main Beamline Alignment 2 Pass CFM CEM Cav. Pol To IRDBS SP-Pol

8 Main Beamline Alignment 4 Pass CFM CEM Cav. Pol To IRDBS

9 Main Beamline Alignment Pinhole viewing system image Goal: Aligning beam to pinhole on each pass How: Use a different mirror to align to passes 1-3. TSF Pass 1: Injection pointing mirror CSF Pass 1: Cavity Polarizer CSF Pass 2: Cavity DM CSF Pass 3: Cavity End Mirror Because of the geometry of the system, if pass 4 is off, the only way to fix it is to start over again with pass 1.

10 Main Beamline Alignment: Short-pulse vs. Long-pulse Long-Pulse All alignment is done with the IRAT No SP-polarizers CSF waveplates allow transmission through Cavity-Polarizer on Pass 2 and transmission through main amps on Pass 3 Short-pulse Twice the alignment Align Beamline w/o SP-polarizers (just like Long-pulse) Align w/ SP-polarizers Alignment w/ SP-polarizers Requires OPCPA (source s beam) Alignment for passes 3 and 4 is done at.1 Hz

11 System configurations System Mode Shot Type PEPC SP-Pols 4 & 5 Single Pulse In Short Pulse BL 1 & 2 7 Double Pulse In Long Pulse 4-6 Single Pulse Out BL 3 & 4 Long Pulse 4-6 Single Pulse n/a

12 Daily shot plans Long-pulse Type 3 Type 4 Type 5C Target shots Short-pulse Type 3 Type 4 Type 5D (5J) Target shots

13 The PEPC holds the pulse in the cavity for four passes and isolates the main amps from target reflections Pass Pass 5 (retro) From laser sources Periscope Fold mirror Booster amplifier Diagnostic beam splitter To compressor PEPC SP-Pols Transport spatial filter Deformable mirror CEM Cavity Pol Rejected light 23 m Cavity spatial filter Main amplifier

14 NF Images - normal 5 NF Inj NF IRDP 3 y [pixel] 4 2 y [pixel] x [pixel] x [pixel] BL4, Shot # 369, 511J to SY Cal

15 NF Images abnormal: conical pinhole clip 5 NF Inj 6 5 NF IRDP 3 y [pixel] 4 2 y [pixel] x [pixel] x [pixel] BL4, Shot # 3554, 421J to SY Cal

16 SI8 Images: BL1 SP y [pixel] 5 NF Inj y [pixel] 5 NF IRDP y [pixel] 5 FF IRDP x [pixel] x [pixel] x [pixel] 5 NF LC 15 5 FF LC 2 y [pixel] 1 5 y [pixel] x [pixel] x [pixel]

17 SI8 Images: BL3 LP 5 NF Inj 5 NF IRDP 3 15 y [pixel] 2 y [pixel] x [pixel] x [pixel] 5 NF UV 8 5 FF UV y [pixel] 4 y [pixel] x [pixel] x [pixel]

18 UV ROSS

19 Energy Data: Shot # 3754 LogNumber: 3754 Calorimetry Energy Report ( Rovers ) 3-Jul-28 12:2:37 (Energy in Joules) Stage Beam Cal ID Tau(sec) Abs Const Rel Const E abs(j) E rel(j) ===== ===== ======= ====== ======== ========= ========= ======== ep_fix LC_OUT HEADING KEY Loc ID ** string representing the group that owns the cal. Cal ID ** Calorimeter serial number. Beam ** unique location id for the cals Location ID. Tau(sec) ** the time it takes the signal to drop one volt. AbsCalConst ** the calibrated constant of the cal determined through electrical calibration. Rel Const ** value of correction to the constant due to windows, filters, pickoffs, etc... E abs(j) ** the measured energy on the cal. E rel(j) ** The energy on the cal multiplied by the Rel. Energy Const

20 Energy Data: Shot # 3754 cont. OMEGA EP SHOT REPORT FOR BEAMLINE 1 Log Number: 3754 Shot Date: 3-Jul-28 12:2:37 Shot Type: Beamline Template #: 434 Shot Status: System Shot Sources Spot Mode Name Spot Counts Energy ==== ===== ====================== =========== ============= 98 SHORT REGEN Output mj 87 SHORT CLARA input mj 89 SHORT CLARA output J 8 SHORT SHG output J 38 SHORT OPCPA: S mj 29 SHORT Pump residual, S mj 18 SHORT OPCPA: S mj 47 SHORT Pump Residual, S mj 9 SHORT OPCPA Output (after SF) mj 69 SHORT Glass Amp Input mj 58 SHORT Source Output mj Beamlines Spot Mode Name Spot Counts Energy ==== ===== ====================== =========== ============= 49 SHORT Beamline Injection J 7 SHORT IRDP kj 2 SHORT Compressor Output J

21 Cal Trace abnormal: Max cal energy set too low BL1 Shot #1167

22 TGA Tiling

23 WCS: The big mystery

24 DM Specs Actuator Stroke Open Loop Stability (Change in Wave Front) Coating Fluence Relative Humidity Atmospheric Pressure Temperature Cavity DM (DM1) <λ/4 reflected wavefront error up to 3 minutes.5 J/cm 2 at 1 ns 2% 76 Torr ± 1Torr 7 F ± 1 F ±7.5 Waves Compressor DM (DM2) <λ/4 reflected wavefront error up to 3 minutes 4.1 J/cm 2 at 1 ps % or < Torr or 76 ± 1 Torr 7 F ± 1 F

25 The DM correction falls off with spatial frequency about as predicted, except for very low frequency 1 Correction MTF of DM Correction Range 164 nm) f = 1/15 cm -1 Cos(x) Cos(y) Influence Fn FFT Larger than expected correction at ½ cycle is likely due to the fact that the mirror is not constrained beyond the outer actuators. i.e. Outer actuators have larger stroke, and the effect is strong near ½ cycle across mirror Spatial Frequency (cm -1 )

26 WCS - Definitions References A measurement of optical chain between perfect wavefront and the WFS Calibrations Measure how a change in voltage is related to a change in WFS spots Corrections w/o PID (or USD) actuator voltages are driven to align WFS spots to reference spot locations w/ PID (or USD) actuator voltages are driven to align WFS spots to reference spot plus an offset Voltage Profile A set of 39 voltages, which when the DM actuator are set to allow for certain DM profile (or correction)

27 Closed access (S-AB-P-199 & S-AB-P-2) OMEGA EP Type 7B closed access to top two levels of TAS Type 7C closed access to EP laser bay?? Type 2 (PILC*, Charge Fire/Dump), 5 & 6 shots require closed access to EP laser bay Type 4 shots to UVDP does not require closed access, however it is recommended to reduce the likelihood of data loss Type 7 shots require closed access to EP laser bay & OMEGA target bay *AT & ALT are permitted to stay in the bay at the south end of the bay or in the switchyard, at the shot director s discretion.

28 Operator Responsibilities: Do not do anything that you have the smallest question about. Stop and ask the questions. Including procedures! Trainers you are responsible for everything your trainee does! Operators are system experts and should recommend changes whenever they see a deficiency or chance for improvement The system changes, so should the procedures Avoid complacency Stay focused on watch Periodic re-reads as necessary Successful operation keeps us all employed Your responsibility is the safety of the system and the quality of the shots!