[Cuga] HDIce Post Doctoral Fellow - 10519---a message from Yvonne Cutler

[Rachel Harris]

    HDIce Post Doctoral Fellow - 10519

 (TERM POSITION ENDING THREE YEARS FROM HIRE DATE)

DATE POSTED: JANUARY 21, 2010

SALARY RANGE: $47,600 - $71,600 (PD)


DUTIES:
A Postdoctoral position is available with the HDice group, working in 
Hall B at Jefferson Lab with a new class of frozen-spin target, solid 
hydrogen-deuteride. The target is polarized at high field (15 tesla) and 
low temperature (10 mK), brought to a frozen spin state and then 
transferred to a comparatively warm (0.3 K), low field (0.2-0.9 tesla) 
open-geometry cryostat where it is used for reaction studies.

In 2010-2011, JLab experiment E06-101 will use longitudinally polarized 
HD to search for new N* resonances in the gamma n -> K Lambda reaction 
through a complete measurement of the cross section and 15 spin 
asymmetries.

Solid HD is expected to retain its polarization with modest electron 
currents. The use of transversely polarized HD, maintained in beam by 
relatively low holding fields, will overcome the problem of the large 
backgrounds that result from the deflection of the beam or atomic 
electrons into the detector by conventional high-field dynamic 
polarization magnets. A direct test with electrons on polarized HD will 
be conducted at the conclusion of E06-101. Experiment E08-021 will 
follow in 2011 with transversely polarized HD to extract Generalized 
Parton Distributions needed to produce 2+1 dimensional tomographic 
images of the proton and neutron.

A new HD cryogenic Laboratory is currently under construction and a new 
dilution refrigerator is under development as an in-beam cryostat to 
hold polarized HD inside the CLAS detector of Hall B. The successful 
candidate will assist in the buildup of the new laboratory and the 
low-temperature cryostats used with solid HD, in R&D to improve target 
characteristics, and in the running and analysis of the E06-101 and 
E08-021 experiments. The individual will also be expected to lend 
general support to the joint efforts of the CLAS collaboration and its 
detector.
 Minimum Qualifications 	 MINIMUM QUALIFICATIONS:
PhD in either Experimental Nuclear/Particle Physics or in 
Low-Temperature Physics. A background in experiments using 
electromagnetic probes to study the structure of nucleons or nuclei is 
preferred but not required. Cryogenic experience is an asset.

Applicants should submit a curriculum vitae on-line and have copies of 
any recent published or unpublished works, along with letters from three 
references noting position number, sent to:

Jefferson Lab
Attn: Human Resources Department, Mail Stop 28D
628 Hofstadter Road-Ste 2
Newport News, VA 23606