TY - JOUR
T1 - Experimental study of positron production from a 2.55-mm-thick silicon crystal target using 8-GeV electron beams with high-bunch charges
AU - Suwada, T.
AU - Furukawa, K.
AU - Kamitani, T.
AU - Satoh, M.
AU - Sugimura, T.
AU - Umemori, K.
AU - Okuno, H.
AU - Hamatsu, R.
AU - Yoshida, K.
AU - Potylitsyn, A. P.
AU - Tropin, I. S.
AU - Chehab, R.
PY - 2006/11/1
Y1 - 2006/11/1
N2 - We have investigated quenching phenomena of channeling radiation through positron production from a silicon crystal hit by a single-bunch electron beam with high-bunch charge at the 8-GeV electron/positron injector linac. The crystal axis, 〈1 1 0〉, was aligned to the electron beam with a precise goniometer, and positrons produced in the forward direction with a momentum of 20 MeV/c were detected with a magnetic spectrometer. Positron yields were measured by varying the charge in a bunch with a typical bunch length of ∼10 ps from 0.1 nC to 2 nC. The corresponding instantaneous current density ranged from 0.15 × 104 to 1.2 × 104 A/cm2. The results show that, at these current densities, the positron yield is proportional to the bunch charge within the experimental accuracy, which implies that no non-linear phenomena are observed in channeling radiation.
AB - We have investigated quenching phenomena of channeling radiation through positron production from a silicon crystal hit by a single-bunch electron beam with high-bunch charge at the 8-GeV electron/positron injector linac. The crystal axis, 〈1 1 0〉, was aligned to the electron beam with a precise goniometer, and positrons produced in the forward direction with a momentum of 20 MeV/c were detected with a magnetic spectrometer. Positron yields were measured by varying the charge in a bunch with a typical bunch length of ∼10 ps from 0.1 nC to 2 nC. The corresponding instantaneous current density ranged from 0.15 × 104 to 1.2 × 104 A/cm2. The results show that, at these current densities, the positron yield is proportional to the bunch charge within the experimental accuracy, which implies that no non-linear phenomena are observed in channeling radiation.
KW - Channeling radiation
KW - Coherent bremsstrahlung
KW - Crystal target
KW - Positron source
KW - Solid-state plasma
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U2 - 10.1016/j.nimb.2006.04.065
DO - 10.1016/j.nimb.2006.04.065
M3 - Article
AN - SCOPUS:33750474091
VL - 252
SP - 142
EP - 147
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
SN - 0168-583X
IS - 1
ER -