Abstract
We have performed an experiment of positron generation using a crystal target at an electron/positron linac at KEK. The target consists of a tungsten crystal to emit photons and an amorphous tungsten for pair creation, whose thicknesses are 0.5 and 2.0 radiation length, respectively. When the 〈1 1 1〉 crystal axis is oriented parallel to the 3 GeV incident electron beam, the positron yield is enhanced by 40% compared to values for the disoriented crystal. No effect of injecting intense ultra-short electron bunches on the crystalline structure is observed. The crystal orientation dependence of the positron yield as well as the enhancement factor can be explained by a simulation assuming a coherent bremsstrahlung process of the electron in the crystal.
| Original language | English |
|---|---|
| Pages (from-to) | 104-111 |
| Number of pages | 8 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
| Volume | 173 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jan 2001 |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation
Cite this
Experiment of positron generation using a crystal target at the KEK electron/positron linac. / Inoue, M.; Takenaka, S.; Yoshida, K.; Endo, I.; Iinuma, M.; Takahashi, T.; Bogdanov, Alexey Victorovich; Kolchuzkin, A. M.; Potylitsin, A. P.; Vnukov, I. E.; Okuno, H.; Anami, S.; Enomoto, A.; Furukawa, K.; Kamitani, T.; Ogawa, Y.; Ohsawa, S.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 173, No. 1, 01.01.2001, p. 104-111.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Experiment of positron generation using a crystal target at the KEK electron/positron linac
AU - Inoue, M.
AU - Takenaka, S.
AU - Yoshida, K.
AU - Endo, I.
AU - Iinuma, M.
AU - Takahashi, T.
AU - Bogdanov, Alexey Victorovich
AU - Kolchuzkin, A. M.
AU - Potylitsin, A. P.
AU - Vnukov, I. E.
AU - Okuno, H.
AU - Anami, S.
AU - Enomoto, A.
AU - Furukawa, K.
AU - Kamitani, T.
AU - Ogawa, Y.
AU - Ohsawa, S.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - We have performed an experiment of positron generation using a crystal target at an electron/positron linac at KEK. The target consists of a tungsten crystal to emit photons and an amorphous tungsten for pair creation, whose thicknesses are 0.5 and 2.0 radiation length, respectively. When the 〈1 1 1〉 crystal axis is oriented parallel to the 3 GeV incident electron beam, the positron yield is enhanced by 40% compared to values for the disoriented crystal. No effect of injecting intense ultra-short electron bunches on the crystalline structure is observed. The crystal orientation dependence of the positron yield as well as the enhancement factor can be explained by a simulation assuming a coherent bremsstrahlung process of the electron in the crystal.
AB - We have performed an experiment of positron generation using a crystal target at an electron/positron linac at KEK. The target consists of a tungsten crystal to emit photons and an amorphous tungsten for pair creation, whose thicknesses are 0.5 and 2.0 radiation length, respectively. When the 〈1 1 1〉 crystal axis is oriented parallel to the 3 GeV incident electron beam, the positron yield is enhanced by 40% compared to values for the disoriented crystal. No effect of injecting intense ultra-short electron bunches on the crystalline structure is observed. The crystal orientation dependence of the positron yield as well as the enhancement factor can be explained by a simulation assuming a coherent bremsstrahlung process of the electron in the crystal.
UR - http://www.scopus.com/inward/record.url?scp=4243292763&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4243292763&partnerID=8YFLogxK
U2 - 10.1016/S0168-583X(00)00195-6
DO - 10.1016/S0168-583X(00)00195-6
M3 - Article
AN - SCOPUS:4243292763
VL - 173
SP - 104
EP - 111
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 -