Main INDEX
Monthly INDEX
PREV
NEXT
User name Saha
Log entry time 14:42:28 on February14,2000
Entry number 33952
keyword=Hall A Beam Optics studies
The Last few hours, we checked the beam optics to Hall A
It looks good, as predicted from optics. (All numbers are in microns)
In Achomatic mode, 5 uA cw, we obtain the following:
Scanner # 1 Dx = 64, Dy = 64
Scanner # 2 Dx = 109, Dy = 55
Scanner # 3 Dx = 36, Dy = 49
Scanner # 4 Dx = 32, Dy = 44
Scanner # 5 Dx = 94, Dy = 110
Scanner # 6 Dx = 98, Dy = 125 --> Beam spot size at Hall A Target
Scanners 1,2,3,4 Average of Scan# 519, 520
Scanners 5,6: Scan #521
OTR (@10 uA) Dx = 145, Dy = 85
OTR (@100 uA) Dx = 165, Dy = 100
See ELOG Entry #100877 for OTR widths vs Current
Dispersive mode optics , 5 uA cw
Scanner # 1 Dx = 98, Dy = 80
Scanner # 2 Dx = 97, Dy = 79
Scanner # 3 Dx = 502, Dy = 154
Scanner # 4 Dx = 695, Dy = 131
OTR (@5uA) Dx = 140, Dy = 80
Back to Achromatic Mode (14:30pm). 5 uA cw
Scan #525
Scanner # 5 Dx = 103, Dy = 85
Scanner # 6 Dx = 105, Dy = 95 --> Beam spot size at Hall A Target
Beam position at target
3Ax Medm 0.175 right ; Scanner#5 0.377 left
3Ay Medm 0.037 up ; Scanner#5 0.258 up
3Bx Medm 0.283 right ; Scanner#6 0.490 right
3By Medm 0.023 down ; Scanner#6 0.019 up