Difference between revisions of "Bubble Chamber Beam Test May 2018"
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{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
| + | | '''Beam Momentum (MeV/c)''' | ||
| '''Beam Kinetic Energy (MeV)''' | | '''Beam Kinetic Energy (MeV)''' | ||
| '''Beam Current (µA)''' | | '''Beam Current (µA)''' | ||
| '''Time (hour)''' | | '''Time (hour)''' | ||
|- | |- | ||
| + | | 5.24 | ||
| 4.75 | | 4.75 | ||
| 50 | | 50 | ||
| 34 | | 34 | ||
|- | |- | ||
| + | | 5.34 | ||
| 4.85 | | 4.85 | ||
| 50 | | 50 | ||
| 41 | | 41 | ||
|- | |- | ||
| + | | 5.44 | ||
| 4.95 | | 4.95 | ||
| 20 | | 20 | ||
| 13 | | 13 | ||
|- | |- | ||
| + | | 5.54 | ||
| 5.05 | | 5.05 | ||
| 10 | | 10 | ||
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| 2 | | 2 | ||
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| + | | 5.64 | ||
| 5.25 | | 5.25 | ||
| 1 | | 1 | ||
Revision as of 10:23, 10 May 2018
Beam Setup and Measurement - May 2018
Bubble Chamber Turn On
- Fill with natural C3F8 – test bubble chamber systems operation
- With beam on bubble chamber radiator:
- How does CCD camera perform under beam-on conditions?
- Count rates on bubble chamber. Do we get single or multiple bubbles from Bremsstrahlung beam exposure?
- Measure gamma ray beam spatial profile as reflected by bubble distribution. Is collimator effective in defining the gamma-ray beam?
- Test the bubble chamber laser shutter (gumby shutter)
- Background measurements:
- Measure beam off environmental background in chamber-injector area
- Measure beam on background by looking outside fiducial volume
- Measure background with beam to Faraday Cup in CEBAF beamline (about two meters from chamber)
- Measure neutron events in chamber. Neutron radiation detectors in injector region will indicate if any neutrons are generated
Bubble Chamber Beam Test
- Bubble Chamber Run Plan
- Draft Run Plan: media:bubble_runplan.pdf
- Systematics:media:bubble_systematics_May2018.pdf
- (Joe) Dispersive and Non-Dispersive Optics for last week's beam study data
Run Plan:
- Check if Bubble Chamber is working properly:
- Start with K.E. of 5.25 MeV
- Determine the initial operational pressure and temperature
- Measure bubble rate. The expected rate is 1 bubble per sec at 10 µA
- Measure rate vs beam current (0.01, 0.1 and 1.0 µA)
- Measure the number of bubbles for 30 minutes per beam current
| Beam Momentum (MeV/c) | Beam Kinetic Energy (MeV) | Beam Current (µA) | Time (hour) |
| 5.24 | 4.75 | 50 | 34 |
| 5.34 | 4.85 | 50 | 41 |
| 5.44 | 4.95 | 20 | 13 |
| 5.54 | 5.05 | 10 | 5 |
| 5.15 | 5 | 2 | |
| 5.64 | 5.25 | 1 | 1 |
- Presentations
- MCC 8 am presentation