High-efficiency beam extraction and collimation using channeling in very short bent crystals.
A silicon crystal was used to channel and extract 70 GeV protons from the U-70 accelerator with an efficiency of 85.3+/-2.8%, as measured for a beam of approximately 10(12) protons directed towards crystals of approximately 2 mm length in spills of approximately 2 s duration. The experimental data follow very well the prediction of Monte Carlo simulations. This demonstration is important in devising a more efficient use of the U-70 accelerator in Protvino and provides crucial support for implementing crystal-assisted slow extraction and collimation in other machines, such as the Tevatron, RHIC, the AGS, the SNS, COSY, and the LHC.
Afonin
A G
AG
Institute for High Energy Physics, Protvino, 142281, Russia.
Baranov
V T
VT
Biryukov
V M
VM
Breese
M B
MB
Chepegin
V N
VN
Chesnokov
Y A
YA
Guidi
V
V
Ivanov
Y M
YM
Kotov
V I
VI
Martinelli
G
G
Scandale
W
W
Stefancich
M
M
Terekhov
V I
VI
Trbojevic
D
D
Troyanov
E F
EF
Vincenzi
D
D