Difference between revisions of "IAC 1-8-08"
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| Line 58: | Line 58: | ||
Run 298: | Run 298: | ||
| − | Move Drift chamber 1 cm (-20,000 on axis 2, 0.4 left arrow on GUI) away from trumpet. | + | Move Drift chamber 1 cm (-20,000 on axis 2, 0.4 [inches] left arrow on GUI) away from trumpet. |
We had no PMT coincidences (OR was on). | We had no PMT coincidences (OR was on). | ||
| Line 69: | Line 69: | ||
Run 301: | Run 301: | ||
| − | Increase gate width to 1 us. PMTs still in the ADCs. Longer gate width allows for complete integration of the wirechamber ADCs. Signals are better. | + | Increase gate width to 1 us. PMTs still in the ADCs. Longer gate width allows for complete integration of the wirechamber ADCs. Signals are better. Position at 1cm from trumpet of feedthrough. |
[http://www.iac.isu.edu/mediawiki/index.php/Mini-prototype#IAC_Runs Go Back] | [http://www.iac.isu.edu/mediawiki/index.php/Mini-prototype#IAC_Runs Go Back] | ||
Revision as of 19:39, 8 January 2008
90/10 ArCo2
| HV settings | ||
| Cable # | Volts | Desc |
| 223A10 | Metalica Sense Wire #4 | |
| 223A11 | Plsstica Sense Wire #4 | |
| 223A12 | 1105 | PMT Scintillator |
| 223A13 | 1110 | Middle Scintillator |
| 223A14 | 1090 | Last Scintillator (Veto) |
| 223A15 | V260 Scaler Input | |
| 223A16 | V260 Scaler Input | |
Drift Chamber HV
| HV settings | ||
| Cable # | Volts | Current (ma) |
| Sense | 1456 | |
| Field | 729 | |
| Guard | 731 | |
ADC Channel ID
| ADC Channel IDs | |
| Channel | Desc |
| 0 | Metalica wire 1 |
| 1 | Plastica wire 1 |
| 14 | Front Scint |
| 15 | Back Scint |
| 16 | Veto Scint |
Run 297:
First measurement with ADCs. Zero position (beam hitting trumpet).
Run 298:
Move Drift chamber 1 cm (-20,000 on axis 2, 0.4 [inches] left arrow on GUI) away from trumpet.
We had no PMT coincidences (OR was on).
This run should be ignored because table position meter ("Axis-3" MC 2000) was on and that caused noise on PMT signals.
Run 298:
Run 300. gate width: 600ns. PMTs not in ADCs. Timing is around 100 ns out of time. Plastica and Metalica look good.
Run 301: Increase gate width to 1 us. PMTs still in the ADCs. Longer gate width allows for complete integration of the wirechamber ADCs. Signals are better. Position at 1cm from trumpet of feedthrough.