Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Performance of CVD diamond detectors for single ion beam-tagging
  applications in hadrontherapy monitoring   In the context of online ion range verification in particle therapy, the
CLaRyS collaboration is developing Prompt-Gamma (PG) detection systems. The
originality in the CLaRyS approach is to use a beam-tagging hodoscope in
coincidence with the gamma detectors to provide both temporal and spatial
information of the incoming ions. The ion range sensitivity of such PG
detection systems could be improved by detecting single ions with a 100 ps
($\sigma$) time resolution, through a quality assurance procedure at low beam
intensity at the beginning of the treatment session. This work presents the
investigations led to assess the performance of Chemical Vapor Deposition (CVD)
diamond detectors to fulfill these requirements. A $^{90}$Sr beta source, 68
MeV protons, 95 MeV/u carbon ions and a synchrotron X-ray pulsed beam were used
to measure the time resolution, single ion detection efficiency and proton
counting capability of various CVD diamond samples. An offline technique, based
on double-sided readout with fast current preamplifiers and used to improve the
signal-to-noise ratio, is also presented. The different tests highlighted
Time-Of-Flight resolutions ranging from 13 ps ($\sigma$) to 250 ps ($\sigma$),
depending on the experimental conditions. The single 68 MeV proton detection
efficiency of various large area polycrystalline (pCVD) samples was measured to
be $>$96% using coincidence measurements with a single-crystal reference
detector. Single-crystal CVD (sCVD) diamond proved to be able to count a
discrete number of simultaneous protons while it was not achievable with a
polycrystalline sample. Considering the results of the present study, two
diamond hodoscope demonstrators are under development: one based on sCVD, and
one of larger size based on pCVD. They will be used for the purpose of single
ion as well as ion bunches detection, either at reduced or clinical beam
intensities.

20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th