1. Radiation Physics Beam Tests J. Bauer, J. Liu, L. Nicolas, S. Rokni, M. Santana ESTB Workshop 2011 March 17, 2011

2. Introduction -RP has been a user of primary and secondary beams at SLAC test beam facilities (FFTB, ESA). Last experiments were T489, T493 -RP also conducted experiments at other labs, e.g. CERN (CERF) and PAL (PHERF) -Previous collaborations with KEK, PAL, CERN and Tsinghua -The main purpose is benchmarking of Monte Carlo codes that are used in the design/optimization of facilities (personal and environmental radiation protection) 2 ESTB Workshop 2011, March 17, 2011

3. Recent related research examples (I) Irradiation experiment T489 (28 GeV) at ESA. Benchmarking of activation and residual dose rates 3 ESTB Workshop 2011, March 17, 2011

4. Recent related research examples (II) Irradiation experiment (2.5 GeV) at PHERF in Pohang Accelerator Laboratory (S. Korea) to study activation of environmental samples and benchmark FLUKA Monte Carlo intra-nuclear cascade code. Analysis is under way. Further experiments seem necessary to better understand possible FLUKA underestimation of 3 H generation as well as of some other radio-isotopes 4 ESTB Workshop 2011, March 17, 2011

5. Areas of interest -Activation and damage measurements -Activation of accelerator components and environmental samples -Damage to electronics and magnets -Shielding measurements: attenuation of muons, neutrons, etc -Measurements of radiation source terms: -Photomuon production: Crucial for shielding of HE e- beams at zero degree angles (e.g. LCLS) -Neutron spectra measurements at HE (TOF) -Photonuclear production, angular spectra. 5 ESTB Workshop 2011, March 17, 2011

6. 3 experiments in 3 years -Activation and damage measurements -Activation of accelerator components and environmental samples -Damage to electronics and magnets -Shielding measurements: attenuation of muons, neutrons, etc -Measurements of radiation source terms: -Photomuon production: Crucial for shielding of HE e- beams at zero degree angles (e.g. LCLS) -Neutron spectra measurements at HE (TOF) -Photonuclear production, angular spectra. 1 2 3 6 ESTB Workshop 2011, March 17, 2011

7. 1) Activation & damage experiment Beam parametersValueComments Particle Type e- Energy 4.0 GeV, 13 GeV Rep Rate Total: 1E16 e- Preferably ~30 W Charge per pulse Energy Spread Bunch length rms Beam spot size, x-y Known within 5 % Others (emittance, …) Total charge known within 2 % LogisticsRequirements Space requirements (H x W x L) 5 m width x 5 m length Duration of Test and Shift Utilization 1 week Desired Calendar Dates Q1 2012 7 ESTB Workshop 2011, March 17, 2011

8. 2) Muon production & shielding Beam parametersValueComments Particle Type e- Energy 4 GeV, 13 GeV Rep Rate Max available Charge per pulse Max available Energy Spread Known within 5 % Bunch length rms Beam spot size, x-y Known within 5 % Others (emittance, …) Total charge known within 2 % LogisticsRequirements Space requirements (H x W x L) 20 m length Duration of Test and Shift Utilization 10 days Desired Calendar Dates Q1 2013 8 ESTB Workshop 2011, March 17, 2011

9. 3) Photo-neutron measurements Beam parametersValueComments Particle Type e- Energy100 MeV, 4 GeV, 10 GeV Rep Rate10-120 Hz Charge per pulseMax availableMonitored Energy Spread Bunch length rms Beam spot size, x-y Others (emittance, …)Total charge known within 2% LogisticsRequirements Space requirements (H x W x L)  m x 10 m x 10 m Duration of Test and Shift Utilization 2 weeks Desired Calendar Dates Q1 2014 9 ESTB Workshop 2011, March 17, 2011