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#### Entry number 107564

keyword=Swing Shift Summary

16:00 Start of Shift We are in the middle of Kin. 6.16

Kin. 6.16
Right arm momentum = 1.985, angle=12.5 deg.
Left arm momentum = 3.17, angle=18 deg.
Septum Current = 184 A

Raster on
Beam Current = 4.7 amp

Right arm run
Time Run Num. Target PS1 PS2 beam lamba/2 target lamba/2 Events
15:53-16:09 2906 3He(0 deg) 1 1 IN OUT 3M
16:10-16:25 2907 3He(0 deg) 1 1 IN OUT 3M
16:26-16:44 2908 3He(0 deg) 1 1 IN OUT 3M
16:45-17:01 2909 3He(0 deg) 1 1 IN OUT 3M
17:02-17:12 2909 3He(0 deg) 1 1 IN OUT 2M
17:28-17:44 2910 3He(270 deg) 1 1 IN OUT 3M
17.45-17:53 2911 3He(270 deg) 1 1 IN OUT 1.5M

16:18 Called MCC and requested that they adjust beam position.

17:12 Request that MCC block the beam so that we can rotate to (270 deg).
17:26 Finish target rotation.
17:27 Request that MCC return the beam.

17:55 Request MCC mask beam for Kinimatic Change and target change.
18:02 Beam masked, start kinimatic switch.
18:41 Kinimatic switch over, asked for beam return.
18:43 MCC called to say we will get beam, the slit is open, and they estimate bleedthrough at 3%.

Kin. 6.18
Right arm momentum = 1.707, angle=12.5 deg.
Left arm momentum = 3.17, angle=18 deg.
Septum Current = 158 A

Raster on
Beam Current = 5.0 amp

Right arm run
Time Run Num. Target PS1 PS2 beam lamba/2 target lamba/2 Events
18.48-18:58 2913 Reference Empty 1 1 IN OUT 1.35M
19.07-19:17 2914 Reference N2 5 5 IN OUT 2M
19.22-19:36 2915 Reference N2 5 5 IN OUT 3M
19:59-20:14 2917 3He(0 deg) 1 1 IN OUT 3M
20:15-20:31 2918 3He(0 deg) 1 1 IN OUT 3M
20:32-20:46 2919 3He(0 deg) 1 1 IN OUT 3M
20:47-20:56 2920 3He(0 deg) 1 1 IN OUT 2M
21:08-21:23 2921 3He(270 deg) 1 1 IN OUT 3M
21:24-21:31 2922 3He(270 deg) 1 1 IN OUT 1.3M

18:59 Request MCC reduce us to 4.7 uA for N2 reference cell run.
19:01 Reference cell at 140 psig.
19:06 The trigger rate is 20khz, so after consulting with RCC, we have set prescales to 5 on the right HRS.

19:20 We are finished with N2, and we are waiting for the Compton studies to be done, to move to 3He position.
19:22 To use beam we are takign a 2nd N2 reference cell run.
19:42 Change target position to 3He Position.
20:31 Bleedthrough with 5uA is 2.62%.

20:57 Request MCC mask the beam, so that we can move to 270 deg. orientation of the 3He target.

21:32 Request MCC mask the beam, so that we can change kinimatics, move to 0 deg. orientation of the 3He target.

22:02 NMR measurement. P=40.05%

22:10 Called MCC and request 10 uA for empty reference cell run.

Kin. 6.20
Right arm momentum = 1.466, angle=12.5 deg.
Left arm momentum = 3.17, angle=18 deg.
Septum Current = 135.5 A

Raster on
Beam Current = ?.? amp

Right arm run
Time Run Num. Target PS1 PS2 beam lamba/2 target lamba/2 Events
22.14-22:23 2923 Reference Empty 1 1 IN OUT 1.4M
22.26-22:36 2924 Reference N2 6 6 IN OUT 1.8M
22:49-23:02 2925 3He(0 deg) 1 1 IN OUT 3M
23:03-23:18 2926 3He(0 deg) 1 1 IN OUT 3M
23:19-23:28 2927 3He(0 deg) 1 1 IN OUT 1.7M
23:38-23:?? 2928 3He(270 deg) 1 1 IN OUT ?M

22:23 Called MCC to request 5 uA for the 141 psig N2 reference cell.
22:37 Called MCC to request a masking of the target, to move the target to pol. 3He position.
23:22 MCC gives us a bleedthrough of 2.91% with a slit position of 36.2 and a Hall C current of 93 uA.

23:28 Called MCC to request a mask of the target, so that we can rotate the holding field from 0 deg to 270 deg.
23:35 Called MCC to request Beam back.

23:53 MCC called they have a Vaccum Fault in Hall A? They are investigating.