On-line control of crystal deflector quality

Results of testing the energy dispersive Si detector with large working area

“…One solution of the diagnostics and monitoring problem based on the use of parametric X-ray radiation (PXR) has been recently proposed [1][2][3] and experimentally investigated [4][5]. In particular, PXR emitted by relativistic protons in crystals was observed in [6][7][8].…”

Characteristic X-ray radiation excited by 450 MeV/nucleon C+6 ions and 1.3 GeV protons in extracted and circulated beams of accelerator U70

“…[1,2]. The parametric X-ray radiation from a crystalline target can be applied for measurements of the beam transverse dimensions [3] and for online diagnostics of the beam deflection in a bent crystal as well as the bent crystal state [4,5]. However, the radiation background in the vicinity of the accelerator can be significant at measurements of X-ray spectra, see e.g.…”

Observation of parametric X-rays produced by 400 GeV/c protons in bent crystals

“…The application of PXR for online diagnostics of the beam and the bent crystal state was proposed in [11]. Recently [12], it was suggested to use PXR to control the state of the crystal deflector during its use for beam extraction and collimation in high energy accelerators, which is slowly changed because of defects produced by irradiation. Studies using a bent crystal as a primary collimator for the Large Hadron Collider (LHC) are under way now at the CERN Super Proton Synchrotron (SPS) [13].…”