Jefferson Lab Weekly Briefs April 7, 2010
Jefferson Lab Weekly Briefs
April 7, 2010
12 GeV Upgrade
The first article four-meter dipole magnet was inspected and accepted at JLab; series production was authorized. Deliveries of beamline quadrupole magnets reached 50 of the total expected number of 125. The contract was awarded for the girders and pedestals to be used for arc 10 and the beamline to Hall D. A vendor site visit was held for the corrector dipole magnets to inspect the first article unit. The contract for the large magnet power supplies was awarded. First article testing of the low-level radiofrequency control boards was successful. First articles of the helium circuit and thermal shield for the cryomodules were received.
In Hall A, the commissioning of the PREX experiment E06-002, measuring the neutron radius in 208Pb to 1 percent, is progressing smoothly. Both the upgrades of the beam polarimeters have been shown to be successful. Production data taking is expected to start shortly.
Nuclear Science and Engineering Scholarships and Fellowships
The accelerator was running well, with low trip rates. The optics in the injector was optimized. Hall A line optics was matched for small beam size. Over the weekend, the air hose to Hall A vacuum valve VBV1H00 disconnected and was reconnected; iocin1mag crashed and was recovered. Both events caused some down time. On Monday, a spin dance was performed to optimize the beam polarization for Hall A.
The FEL team spent the week setting up the injector and re-establishing proper beam operation conditions. Several studies on the phase stability of various components in the injector were performed. The team progressed to the point that the linac is properly phased, but more work is needed on the magnetic matching.
JLab's Safety Numbers
22 Days since Last Recordable Accident (JLab record: 331)
JLab Calendar of Events
April 14-15: AVS Mid-Atlantic chapter meeting and short course
Environment, Safety, Health & Quality
Your safety should always be your primary concern when attempting to fight a fire. Remember, JLab does not require its employees to fight fires unless they are trained to do so, act voluntarily, are assured of their own escape and are aware that the Fire Department has been called. Before deciding to fight a fire, be certain that:
JLab provides SAF108 Fire Safety training for those individuals who act as a fire watch or Safety Warden. It is a combination classroom and hands-on training where the student actually extinguishes a fire. You can register for the class online.
Computing and Networking Infrastructure
Redhat Enterprise Linux Version 3 Support Ending
Last Chance to Vote for JLab's 2010 T-Shirt Design
JSA Research Assistantship Offered
Lunch Seminar: Driving Ahead in Challenging Times
Lecture on Light at ODU
TIAA-CREF Counseling Sessions
Free Seminar on Vacuum
Interested in Golf?