High Energy Electron Radiation Exposure Facility at PSI

Wojtek Hajdas^1*, L. Desorgher¹, K. Deiters¹, D. Reggiani¹, Th. Th. Rauber¹, M. Tulej², P. Wurz², M. Luethi², K. Wojczuk¹, P. Kalaczynski¹

¹Paul Scherrer Institut (PSI), Villigen, Switzerland.
²University of Bern, Bern, Switzerland.

DOI: 10.4236/jamp.2014.29103                

Abstract

Paul Scherrer Institut hosts the Proton Irradiation Facility used for radiation effects studies and exposure tests in preparation of satellite missions for the European Space Agency. The facility allows for realistic simulation of the space proton spectra in the energy range from 6 MeV up to 230 MeV with exposure fluxes ranging from very low up to as high as 10⁹ p/cm²/sec. Recently, approved ESA mission to Jupiter—JUICE—also brought a need for tests with high energy electron beams. For this purpose, another facility was established in the PSI secondary beam area piM1. Secondary particles are produced on the thick carbon target hit by energetic proton beam. Dedicated beam optics enables selection of the particle charge and momentum and guides them to the tests area. Characterization of electron beams at various momenta was performed with respect to their intensity, profiles and contamination by pions and muons. Electron fluxes ranging from 1.5 × 10³/cm²/s at 20 MeV/c to 2.3 × 106/cm²/s at 345 MeV/c with gaussian beam profiles with FWHM of about 4 cm were measured. Beam contamination with heavier particles becomes negligible for all momenta lower than 115 MeV/c. This allows for using them for components and shielding characterization and detector calibration experiments. Several such experiments have been already performed utilizing available beam time of few weeks per year.

Keywords

Irradiations, Electron Beams, Components Tests, Exposure Facilities

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Deiters, K. (2013) piM1 Beamline. http://aea.web.psi.ch/beam2lines/beam_pim1.html
[2]	Tulej, M., et al. (2014) August 2014 submitted to nuclear instrument and methods.
[3]	M. Kohl for MUSE Collaboration (2014) Muon elastic scattering with MUSE at PSI. EPJ Web of Conferences 66, 06010.