Positrons
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
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
- PePPO_2011Run
- PePPO_2012Run
- PePPO_02222012
- PePPO_03132012
- PePPO_03242012
Simulations
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
Neutron production
Positron_Yield_Estimate
PEPPo Comparison
The annihilation counter observed 1 e+ for every nA of electrons beam. I was not sure what the compton polarimeter is observing given the large background. Use the above to predict our rate if we run the HRRL at 80 mA peak current with 50 nsec wide pulses and a rep rate of 300 HZ.
<math>1~nA = 10^{-9}~C/s<math>
MDC Parts list
Parts received
Mar 10th 2012
| Part# | Quantity | Discription | Link |
| 450005 | 1 | view port | big viewport for corosses |
| 110022 | 1 | Blank off | Blank off |
| 611005 | 2 | feedthrough for cooling | feedthrough for cooling |
| 404048 | 1 | Reduced T | reduec T for ion pump |
Apr 17th 2012
| Part# | Quantity | Discription | Link |
| 450005 | 1 | view port | big viewport for corosses |
| 100021 | 2 | Flng, 4.5"x2.5"Rotatable | long beam pipe flanges |
Apr 23 2012
Long beam pipe through the wall is ready.
Apr 30th 2012
| Part# | Quantity | Discription |
| 1 | Installation kit for chaber vacuum window |
May 14th 2012
| Part# | Quantity | Discription | Link |
| 9712007 | 1 | Viewport for vaccum chamber | viewport |
May 18th 2012
| Part# | Quantity | Discription | Link |
| 407005 | 1 | 6-way cross for Flag 3 | 6-way cross |
| 9132004 | 1 | 10 pin electric feed through | feed through |
May 26th 2012
2 Faraday cups
Parts expecting
1) One 5 way cross;
1. 4-6way cross for 45 degree line
1) 5 way cross for 45 degree.
2) Blank-off or view port. (If we borrow the view port 0 degree, we need to buy a blank-off for 0 degree.)
| Parts | Quantity | Link | Delevary status |
| 5-way cross | 1 | 5-way cross | |
| View Port | 1 | VPQ-300, quote from last time File:Hrrl-view-port-quote.pdf This item chaged to [MDC viewport for corosses] | Delevered |
| Blank off | 1 | Blank off | Delevered |
2. 5-6 way cross for 90 degree line
Do we need Faraday Cup at the end of 90 degree?
| Parts | Quantity | Link | Delevary status |
| 6-way cross | 1 | 6-way cross | |
| Faraday Cup | 2 (1 for 45 degree and 1 for 90 degree) | Faraday Cup, Buy this one Faraday Cup | |
| View Port | 1 | VPQ-300, quote from last time File:Hrrl-view-port-quote.pdf This item chaged to [MDC viewport for corosses] | Delevered |
4. Flanges for 90 degree beam line
| Parts | Quantity | Link | Deleveray status |
| Flng, 4.5"x2.5"Rotatable | 2 | Flange 450-250 | Delevered |
5. Ion pump parts
Ion pump parts
| Parts | Parts Label | Quantity | Link | Delevaray status |
| Reduced 3-way Cross (T) | ReducingTee, 4.5"x2.75" | 1 | Reduced T | Delevared. |
6. Target chamber parts
Target chamber parts (HV = 10^{-8} Torr)
a.) 10- pin wiring feedthrough
http://www.mdcvacuum.com/displayproductcontent.aspx?d=MDC&p=i.1.1.2.1
b.) 4 flexible hoses for cooling lines (at least nitrogen gas hopefully liquid nitrogen)
http://www.mdcvacuum.com/displayproductcontent.aspx?d=MDC&p=m.6.2.4.1
c.) IR optical window for target temperature measurement
http://www.mdcvacuum.com/displayproductcontent.aspx?d=MDC&p=i.7.1.1.1
| Parts | Quantity | Link | Delevary status |
| 10 - pin wiring feedthrough | 1 | Pin Through | |
| 4 flexible hoses for cooling lines | 2 | Cooling Hoses | deleraved |
| IR optical window | 1 | Optical Window | delevared |