Revision as of 22:31, 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

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)

The performance of positron source using a quad triplet collection system has been measured using the support from this award.

An initial set of positron production efficiency measurements were performed

The beam line used for an initial set of positron production measurements

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.

HRRL beamline for positron generation.

@@ Line 64: / Line 64: @@
 |[[Image:Run60_HpGe-NaI.gif | 200 px]] || [[Image:PositronYield_SweeperMagnet_run60-61.gif | 200 px]]
 |-
-|The observed photon energy distributionas as measured by the HpGe (top) and NaI (bottom) detectors. || The HpGe photon energy distribution before and after a sweep magnet is used to deflect charged particles away from the conversion target.
+|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.
 |}