Log entry time 01:00:22 on November 26, 2008

Entry number 250787

Summary for Nov 24 (swing) - Nov 25 (swing)

Smooth data for Nov 24 swing and Nov 25 owl. The target cell changed on Nov 25 day. Beam is back at about 21:40. A regular Compton tune performed (without any tilt as before).

Beam in Use

shift	ABU	BANU	BNA
2008/11/24 swing	5.95	0.32	1.73
2008/11/25 owl	7.08	0.00	0.92
2008/11/25 day	0.28	3.09	4.62
2008/11/25 swing	0.58	5.66	1.76
total	13.89	9.07	9.03

Main events/issues:

• The regular Compton tune, without a previous tilt, was successful. The background in the photon detector from the Hall B beam is still high. Closing the Hall A slit and reducing the attenuation reduced the background by a factor of 20. A good Compton spectrum from the photodetector is demonstrated. The source of noise in the electronic detector is found.

Plans for the next few days:

• Measurements with the reference cell, outlined on the white board.
• Production.