Difference between revisions of "Bubble Chamber Beam Test May 2018"
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Revision as of 10:26, 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 | 31 |
| 5.34 | 4.85 | 50 | 40 |
| 5.44 | 4.95 | 20 | 13 |
| 5.54 | 5.05 | 10 | 6 |
| 5.15 | 4 | 3 | |
| 5.64 | 5.25 | 1 | 3 |
- Presentations
- MCC 8 am presentation