Positrons
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Proposals
Collaboration
Work
Designs
- IAC positron beamline
- OptiM32_HRRL_PositronDesign
- Beamline design (G. Stancari)
- Beamline design (Y. Kim)
- Beamline_Drawing_2011_J.Ellis
- HRRL_Positron_Rotating_W_Target
- 90 degree beamline extension
- Beamline design drawing
HRRL beam Line installation
Experiments
- HRRL_Experiment_Readiness_Chek_List
- CHIPS_Run_Feb-2008
- CHIPS_Run_May-2008
- HRRL radiation tests
- Emittance Test
- HRRL OTR Test Feb 16th 2011
- HRRL OTR Test Mar 3rd 2011
- HRRL_Emittance_Measurements_March14-18-2011
- Emittance Measurement with Optical transition Radiation (OTR)
- PePPO_NaI_PositronDetector_4_JLab
- IAC_NaI_Detectors
- Coincidence_with_NaI_Detectors
- Beam_Test_Apr_24_2012
- Beam_Test_Apr_26_2012
- Beam_Text_May_17_2012
- HRRL_July_2012Run
- PePPO_2011Run
- PePPO_2012Run
- PePPO_02222012
- PePPO_03132012
- PePPO_03242012
- PePPO_05302012
[PEPPo_Software]]
Simulations
- HRRL radiation footprint simulations
- HRRL Move_2010
- Optimization of Positron Capturing
- July2012PosSimulation
Equipment
References
- JLab Positron Wiki
- JPOS09
- Positron_References
- Python
- File:SadiqTalkPePPO 4-26-2011.pdf
- e+ Gun Beam Line Construction
- Positron Annihilation
- Quad Scan Method File:Emit Meas DAFNE Linac e Beam.pdf
- IPAC_2012
Vendors
Calculations
511 keV photon attenuation in tungsten
Neutron production
Task list
| Priority | task |
| 1 | Order target chamber |
| 1 | Order 8 tungsten targets, 2 mm thick |
| 1 | Order cooling lines for target chamber |
| 1 | Order 8 tungsten targets, 2 mm thick |
| 2 | Build box to hold target motor controls, pull cables |
| 3 | enclose HRRL cavity with 1/4" lead |
| check all connectors are in hand for target control | |
| check camera pulse trigger synchronization | |
| check beam line alignment , are energy slits centered, is 90degree line going straight through wall | |
| bolt last flange to girder after last set of quads | |
| tungsten target holder for rotating target | |
| 1 | Ta or W re-conversion target for Flag 3 |
| check flag 2 yag optics & setup, need way to switch internet between cameras so one computer can record images from each separately | |
| two sets of steering magnets for 90 degree line | |
| pull cable for FCC signals and fan out to control room and DAQ room
| |
| in progress | Check the alignment. |
| done | Find DAQ hard-wares from Dr. McNalty's lab. |
| done | Ask Chad to make FC cooler. |
| in progres | Work on Table design. |
| in progres | Align YAG at the center of the 5-way cross. |
| Check the JAI camera trigger and trig it synchronously with LED. | |
| in progres | Order W-targets -- Just order them online. |
| done | Order Prosilica camera cable -- Waiting for the confirmation. |
| in progres | Install beam parts. (Ens, Flag2 Dipole2, Long beampipe, FC2, Flag2 gas.) |
| Find W-Target and target holder. | |
| Find a pipe (or 3-way cross) to replace 5-way cross. | |
| Install 45-deg Flag to W-target position. |
Things to do for the next run
1. W target holder and W target desinge
2. hose from copper cooling lines to feedtrough. (swagelok, simlar with target cooling).
3. chamber: 6 week lead time.
4. cooling connection, check valve, nitrogen bottles, plastic pipes.
5. light emitting diode and detecting photo diode.
6. theromo-copler to on the things to monitor temperture. (thermestors glue on copper line, stanless steel line). thermestors need to be in the range of the parts they are on. Check the document of the motor for its temperature range.