Difference between revisions of "Moller Polarimeter"
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== General information == | == General information == | ||
| − | This article will cover all things Hall-C Moller. | + | This article will cover all things Hall-C Moller. Currently, this includes all of the Qweak information. Information for past experiments can be found in the experiments section. This page is currently under construction, so please come back soon for more, or update me. |
== Documentation and references == | == Documentation and references == | ||
| Line 14: | Line 14: | ||
[[Image:Moller_plot_jan30_2011.png]] | [[Image:Moller_plot_jan30_2011.png]] | ||
| − | + | As of Jan 30, 2011 the following quad current and collimator positions are as follows: | |
| − | + | <pre> | |
| − | + | Quad 1: 93 A | |
| − | + | Quad 3: 129 A | |
| + | Col # Position (cm) | ||
| + | 1 -1.55 | ||
| + | 2 -1.55 | ||
| + | 3 -4.05 | ||
| + | 4 -4.15 | ||
| + | 5 Out of beam | ||
| + | 6 -3.20 | ||
| + | 7 -3.20 | ||
| + | </pre> | ||
==Hardware configuration & changes== | ==Hardware configuration & changes== | ||
Revision as of 15:38, 31 January 2011
General information
This article will cover all things Hall-C Moller. Currently, this includes all of the Qweak information. Information for past experiments can be found in the experiments section. This page is currently under construction, so please come back soon for more, or update me.
Documentation and references
The following are useful references:
- A High Precision Polarimeter (jlab document JLAB-PHY-99-29)
- Loppacher's thesis
- g0 polarization (draft 3)
The following is a plot showing a good tune of the apparatus. It was taken Jan 30, 2011 from run 700, with conditions: hallc:p is 1159 MeV, with a 1um target.
As of Jan 30, 2011 the following quad current and collimator positions are as follows:
Quad 1: 93 A Quad 3: 129 A Col # Position (cm) 1 -1.55 2 -1.55 3 -4.05 4 -4.15 5 Out of beam 6 -3.20 7 -3.20
Hardware configuration & changes
NB: Up until last run in December (date tbd)we used BCM 2 with gain from Kat's Faraday cup measurements.
- (Jan 30, 2011) Increased the left and right detector high voltages, as seen below. This is a significant change in the voltages since tune-up, and is evidence of pmt radiation effects.
| New HV | Old HV | |
|---|---|---|
| Left | 1630 | 1480 |
| Right | 1655 | 1520 |
Experiments
- Qweak
- Qweak Moller How-To (pdf)
- Qweak Moller How-To (tex file)
