CHIPS IAC Run 5-29-08

Calibration

Run #	MPA file name	Description
40	NaI040.mpa	Na-22 source in front of HpGe and Co-60 on top of NaI detector
41	NaI019.mpa	Co-60 source in front of HpGe and Na-22 on top of NaI detector

Last Dipole Sweep

Tune 10 Mev onto Tungsten and 4 MeV into Cell

We put in two thin pieces (thickness ~1/4" each) making a ~1/2" of lead angled at ~30 degrees wrt vertical between the NaI detector and the collimator to cut down on low-energy (< 200 keV) photons.

Run #	MPA file name	W	Ta	Description
45	NaI045.mpa	IN	IN	Dipole at 2 MeV (0.78 on Pot), 60 Hz rep rate
46	NaI046.mpa	IN	IN	Dipole at 2 MeV (0.78 on Pot), 300 Hz rep rate, 116 [math]\pm[/math] 15 counts at 500 keV, Live=929 seconds
47	NaI047.mpa	IN	Out	Dipole at 2 MeV (0.78 on Pot), 300 Hz rep rate, 53 [math]\pm[/math] 9 counts at 500 keV, Live=607 seconds, (Tant IN/Out ratio =116/53 [math]\times[/math] 607/929 = 1.4)
48	NaI048.mpa	IN	Out	Dipole at 3 MeV (1.13 on Pot), 300 Hz rep rate, 90 [math]\pm[/math] 11 counts at 500 keV, Live=600 seconds, ignore NaI (cable not plugged into scope)
49	NaI049.mpa	IN	In	Dipole at 3 MeV (1.13 on Pot), 300 Hz rep rate, 113[math]\pm[/math] 12 counts at 500 keV, Live=634 seconds,plugged NaI cable back into scope in middle of run. ((Tant IN/Out ratio =113/90 = 1.26 )

Accelerator Gun problem (ground wire shielding was worn away and creating path for short)

Restore tune with settings below.:

Device	setting
RS1	0+
RS2	0-
FS1	0+
FS2	0-
0Q1	-0.20
0Q2	+2.86
45Q1	-0.004
45Q2	+2.24
L90Q1	-1.33
L90Q2	+2.42
Bend1	3.5
Bend2	0.86
Gun HV	13 kV
Grid	2.31
802	16 kV
SOL1	0.39
SOL2	0.40

Run #	MPA file name	W	Ta	Description
56	NaI056.mpa	IN	In	Dipole at 3 MeV (1.11 on Pot), 300 Hz rep rate, (802 set to 15.7 kV. 48[math]\pm[/math] 8 counts at 500 keV, Live=600 seconds, grid = 1.64, Gun = 3 kV.

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