Difference between revisions of "Bubble Chamber Beam Test May 2018"
Jump to navigation
Jump to search
| Line 1: | Line 1: | ||
= '''Bubble Chamber Turn On''' = | = '''Bubble Chamber Turn On''' = | ||
| − | * '''Fill with natural C<sub>3</sub>F<sub>8</sub>– test bubble chamber systems operation''' | + | * '''Fill with natural C<sub>3</sub>F<sub>8</sub> – test bubble chamber systems operation''' |
| Line 17: | Line 17: | ||
# Measure beam on background by looking outside fiducial volume | # 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 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 | + | # Measure neutron events in chamber. Neutron radiation detectors in injector region will indicate if any neutrons are generated |
| Line 47: | Line 47: | ||
| '''Beam Current (µA)''' | | '''Beam Current (µA)''' | ||
| '''Time (hour)''' | | '''Time (hour)''' | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
|- | |- | ||
| 4.7 | | 4.7 | ||
| Line 85: | Line 73: | ||
|- | |- | ||
| 5.3 | | 5.3 | ||
| − | |||
| − | |||
| − | |||
| − | |||
| 0.2 | | 0.2 | ||
| 5 | | 5 | ||
Revision as of 08:47, 2 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
Run Plan:
- Check if Bubble Chamber is working properly:
- Start with K.E. of 5.2 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 Kinetic Energy (MeV) | Beam Current (µA) | Time (hour) |
| 4.7 | 2 | 5 |
| 4.8 | 2 | 5 |
| 4.9 | 1 | 5 |
| 5.0 | 1 | 5 |
| 5.1 | 0.8 | 5 |
| 5.2 | 0.4 | 5 |
| 5.3 | 0.2 | 5 |
- Presentations
- MCC 8 am presentation