Difference between revisions of "Wednesday July 24, 2013"
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Notes from this meeting: | Notes from this meeting: | ||
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* Radiator: | * Radiator: | ||
| Line 60: | Line 42: | ||
- Need a layout of the beam line. What is the location of the radiator on the beam line? | - Need a layout of the beam line. What is the location of the radiator on the beam line? | ||
- Need a HARP in the new Bubble Chamber line to measure beam profile and energy spread | - Need a HARP in the new Bubble Chamber line to measure beam profile and energy spread | ||
| − | - Where to put the electron dump (2-ft cube footprint)? Injector floor or on the Step. | + | - Where to put the electron dump (2-ft cube footprint)? Injector floor or on the Step |
| − | - Photon dump must be of pure aluminum | + | - Electron dump must be of pure copper, contaminants must have high photo-neutron threshold (>8.5 MeV) |
| + | - Photon dump must be of pure 1100 aluminum | ||
* Safety: | * Safety: | ||
- The sweep dipole must be in FSD to protect the exit window | - The sweep dipole must be in FSD to protect the exit window | ||
| − | - | + | - here will be about 500 ml of mercury used a buffer liquid in the chamber |
| − | + | - | |
| − | - What is the clearance between the wall and the Laser Room in the Injector? | + | |
| + | * Infrastructure: | ||
| + | - The chamber weighs about 600 lb and comes with a compressor (3.5 ft by 3.5 ft footprint) and a chiller (10 C). | ||
| + | - What is the clearance between the wall and the Laser Room in the Injector? | ||
| + | - Need 208 VAC outlet | ||
| + | |||
* We will meet every two weeks on Wednesdays at 3:00 to 5:00 EST | * We will meet every two weeks on Wednesdays at 3:00 to 5:00 EST | ||
Revision as of 09:50, 1 August 2013
We will meet in TED 2561B on Wednesday July 24 at 3:00 pm EST.
For those calling in we'll use the ReadyTalk audio conference system.
1. Dial Toll-Free Number: 866-740-1260 (U.S. & Canada) 2. Enter 7-digit access code 4402297, followed by “#”
Agenda:
media:Meeting_24July_2013.pdf media:Meeting_24July_2013.pptx
1- Schedule
2- Design of beamline, radiator and dump
- Experiment beam line today is presently decommissioned, ready for modification:
3- Bubble Chamber work at Argonne
4- Background and simulation
5- Absolute beam energy
- One slide on beam momentum Media:130724_Bubble_Grames.pdf
6- Safety
Notes from this meeting:
- Radiator:
- The power deposited in the radiator for 200 uA and 8.5 MeV electron beam: For 0.02 mm radiator, average energy loss is about 24 keV, P = 4.8 W For 0.10 mm radiator, average energy loss is about 120 keV, P = 24 W Re-evaluate radiator cooling What is the temperature of the LCW that will be used to cool the radiator? - On the radiator ladder, we should have a viewer and preferable a YAG viewer to check the beam size - Need a camera to look at the OTR light coming from the radiator - What is the energy distribution of the electron beam after radiator
- Beamline:
- Need a layout of the beam line. What is the location of the radiator on the beam line? - Need a HARP in the new Bubble Chamber line to measure beam profile and energy spread - Where to put the electron dump (2-ft cube footprint)? Injector floor or on the Step - Electron dump must be of pure copper, contaminants must have high photo-neutron threshold (>8.5 MeV) - Photon dump must be of pure 1100 aluminum
- Safety:
- The sweep dipole must be in FSD to protect the exit window - here will be about 500 ml of mercury used a buffer liquid in the chamber -
- Infrastructure:
- The chamber weighs about 600 lb and comes with a compressor (3.5 ft by 3.5 ft footprint) and a chiller (10 C). - What is the clearance between the wall and the Laser Room in the Injector? - Need 208 VAC outlet
- We will meet every two weeks on Wednesdays at 3:00 to 5:00 EST