Difference between revisions of "JLAB Positron Source DOE Award DE-SC0002600"
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|A drawing fo the NaI detectors used to measure 511 keV photons from the annihlation of positrons by T2. || A picture of detectors along with modified bases. || A calibrated energy distribution using a Co-60 and Na-22 button source. | |A drawing fo the NaI detectors used to measure 511 keV photons from the annihlation of positrons by T2. || A picture of detectors along with modified bases. || A calibrated energy distribution using a Co-60 and Na-22 button source. | ||
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| + | |||
| + | |||
| + | ====Things not accomplished==== | ||
| + | |||
| + | No Positron workshop but rather a PePPO collaboration meeting | ||
| + | |||
| + | Used OTR to measure emmittance. | ||
| + | |||
| + | Positron current was too low for a FC measurement | ||
Revision as of 22:44, 22 July 2013
Award Info
8/15/09 - 8/14/2012
Funds Obligated: $381,509
Funds Requested: $411,509
Sponsored Project Proposal Number : 8-17
DOE Award Number : DE-SC0002600
Accounts set up on 10/14/09
Banner Index : RACL39 Account Numer : 684-143-40
Fund: X10165, Org code: 640000, Program : 040R0
Final Report
DOE Award #: DE-SC0002600
Project Title: The Development of a Positron Source for JLab at the IAC
Date: 8/1/13
Period covered: 8/15/09-8/14/2013 (Final Report)
Accomplishments
The performance of positron source using a quad triplet collection system has been measured using the support from this award.
Initial Positron production measurement
An initial set of positron production efficiency measurements were performed
 |
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| The beam line used for an initial set of positron production measurements | A picture of the HgPe detector entrance and Farraday cup. |
| Item | Description |
| Tantalum Foil | 6 mm thick 20 mm x 20 mm area |
| Tungsten Foil | 2 mm thick 20 mm x 20 mm area |
| Phosphorus Flag | 1 mil aluminum backing |
| Media:HpGe_Crystal_GEM-60195-Plus-P.pdf | 81.3mm Diameter, 55.5mm Length |
| NaI detector |
 |
|
| The observed photon energy distributions as measured by the HpGe (top) and NaI (bottom) detectors. There was no coincidence requirement using the two detectors. | The HpGe photon energy distribution before and after a sweep magnet is used to deflect charged particles away from the conversion target. |
2nd Generation positron source
Beamline Optimization
|
| HRRL beamline for positron generation. |
Positron converter target
Positron Production Performance
 |
 |
|
| A drawing fo the NaI detectors used to measure 511 keV photons from the annihlation of positrons by T2. | A picture of detectors along with modified bases. | A calibrated energy distribution using a Co-60 and Na-22 button source. |
Things not accomplished
No Positron workshop but rather a PePPO collaboration meeting
Used OTR to measure emmittance.
Positron current was too low for a FC measurement