Proposal of a high-field superconducting wiggler for a slow positron source at SPring-8.
A low-energy positron beam is a unique probe of materials. In high-energy electron and positron storage rings it is possible to generate intense synchrotron radiation with a photon energy of 1-3 MeV by installing a high-field (8-10 T) superconducting wiggler. High-energy photons are converted to low-energy positrons by using a suitable target-moderator system. For an 8 GeV electron storage ring at a beam current of 100 mA, final yields are estimated to be about 10(8)-10(10) slow-e(+) s(-1) or larger depending on the moderation efficiency, with the size of the positron source 10(1)-10(2) cm(2). In the present work a wiggler magnetic system of 10 T is proposed. The main parameters of the superconducting wiggler are presented.
Ando
A
A
SPring-8, Kamigori, Hyogo 678-12, Japan, and Laboratory of Advanced Science and Technology for Industry, Himeji Institute of Technology, 2167 Shosha, Himeji, Hyogo 671-22, Japan.
Daté
S
S
Fedurin
M G
MG
Hara
M
M
Kamitsubo
H
H
Kiselev
A V
AV
Kulipanov
G N
GN
Kumagai
N
N
Mezentsev
N A
NA
Miyahara
Y
Y
Nakamura
T
T
Ohkuma
H
H
Shkaruba
V A
VA
Skrinsky
A N
AN
Soutome
K
K
Takao
M
M
Tanaka
H
H