The ALPHA facility at Indiana University New Capabilities for Dose Rate Testing
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1 The ALPHA facility at Indiana University New Capabilities for Dose Rate Testing P.E. Sokol, S.Y.Lee, T. Rinckel, C. Romel, R. Ellis, G. East, Y. Jing, P. McChesney, X. Pang Indiana University S. Clark NSWC Crane
2 Strategic Systems NSWC Crane is the leader in the Navy Strategic Systems community for failure and material analysis of space and high reliability electronics and the integration of Commercial Off-the-Shelf products. NSWC Crane supports. Guidance Systems Missile Systems Fire Control Systems Navigation Systems GPS Systems Radiation Tolerant Electronics NSWC Crane is assigned as the Leader in Radiation Tolerant Electronics Leader in Commercial Off-the-Shelf Technology "911" Engineering Activity for Strategic Systems Program Office Thru Design Modeling and Simulation Design of Radiation Tolerant Microelectronics Design of High-Reliability Microelectronics Application and Integration of Commercial Off-the-Shelf Technology Systems Engineering Inertial Sensor Expertise Satellite and Missile Electronics Radiation Testing Failure and Material Analysis Component Reliability and Quality Analysis Component Destructive Physical Analysis GPS Receiver Integration
3 Radiation Effects NSWC Crane s Strategic Mission support testing of electronics in various radiation environments both manmade and natural. Natural Environments Galactic Cosmic Rays Solar Protons & Heavy Ions Trapped Particles Man Made Environments Natural Environments Solar Protons Galactic Cosmic Rays (Neutrons) Man Made Environments Neutrons Gamma Rays
4 Current Crane Capabilities Capabilities Dose Rate (Rad/s) 1x1 12 Pulse Width (narrow) Pulse Width (wide) Beam Spot Size Pulse Rep Rate Energy 1-5 ns 1-5 us 4 mm 1 shots/sec 4-6 mev Most powerful electron accelerator in the Department of Defense Moore s Law MHz GHz Pentium Linac 1.3 GHz Klystrons
5 Goals Eliminate RF Modulation Provide higher dose rates for survivability testing. Provide higher fidelity test environment More uniform beam Larger area beams More hospitable test environment Low electronic noise Solution Overview Couple a linac with a electron storage ring Long pulse mode (up to 4 µs) Debunching Short Pulse mode (.1-5 ns) High dose rate (> 1 12 Rad/s) Use non linear optics to shape beam Eliminate masking and associated secondary scattering More efficient use of beam
6 Long Pulse Operation +1% Requirement Instantaneous Dose Rad/s Rate Beam Size 6.45 cm 2 Pulse Length 4 µs Repetition Rate 1 Hz LINAC Current.68 A
7 Debunching x 1-3 Injection FFT x x x x x di dt x Alpha Injection Line Measurement x Extraction FFT x x x x 1-6 x x 1-6
8 Short Pulse Operation Requirement Instantaneous Dose Rate Rad/s Beam Size 16 cm 2 Pulse Length 25 ns Repetition Rate.16 Hz (1 min period) Stored Charge 1 nc
9 Dose Rate Long Pulse Operation Dose Rate = Rad s 2 cm amp I A Requirement Instantaneous Dose Rad/s Rate Beam Size 6.45 cm 2 Pulse Length 4 µs Repetition Rate 1 Hz LINAC Current.68 A Short Pulse Operation Dose Rate = Rad s 2 cm ns nc Q A T Requirement Instantaneous Rad/s Dose Rate Beam Size 16 cm 2 Pulse Length 25 ns Repetition Rate.16 Hz (1 min period) Stored Charge 1 nc
10 Beam Delivery
11 Non- linear Beam Spreading Octopole Magnet for nonlinear beam spreading
12 Matching the Device Beam size can be adjusted in x and y direction using quadrupole magnets quadrupoles octopoles Crane s ELDRS Test Chip
13 Test Area Timeline for Completion June 211 Circulating beam in ring Oct 211 Extraction of Stored beam Dec 211 Phase II Linac installed Jan-Jun 212 Commissioning and validation studies July 212 Ready for testing programs
14 Conclusions Alpha delivers new capabilities for dose rate testing Reduced RF structure (>1%) High transient dose rates (1 12 ns and 16 cm 2 ) Note D 1 A t Clean test environment No masking Reduced secondary scattering
15 Agenda Tuesday, May 1 8: 8:3 Continental Breakfast 8:3 8:4 Introductory Remarks Paul Sokol 8:4 8:45 Welcoming Remarks Sarita Soni (Vice Provost for Research Indiana University Bloomington, Associate Vice President Indiana University) 8:45 9: Opening Comments Steve Clark 9: 9:45 Description of ALPHA Paul Sokol 9:45 1:15 Break 1:15 11: Tour of ALPHA 11: 11:2 Radiation Safety Andrew Edwards 11:2 11:4 Device Test Area Chandra Romel 11:4 12:15 Discussion 12:15 1:3 LUNCH 1:3 2:15 Beam Characterization Patrick McChesney 2:15 2:35 Controls and Interfaces Max Ellis 2:35 2:45 Discussion 2:45 3:15 Break 3:15 3:35 User Support Gary East 3:35 4:15 User Needs I 4:15 5: Panel Discussion Paul Sokol 5: 6: Travel to Stone Age Institute 6: 7: Reception 7: 9: Dinner Men s Ladies Lunch
16 Wednesday, May 11 8: 8:3 Continental Breakfast 8:3 9:15 User Needs II 9:15 1: User Needs III 1: 1:3 Break 1:3 11:15 Correlation Studies Steve Clark 11:15 12: Meeting Summary and Action Items 12: Meeting End
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