Jefferson Lab Weekly Briefs May 13, 2009
Jefferson Lab Weekly Briefs
May 13, 2009
12 GeV Upgrade
The contract for fabricating the 13kW klystrons has been awarded to L3 Communications in Williamsport, PA. This is the first major procurement awarded for the accelerator systems for the 12 GeV Upgrade. The contract for the waveguides for the cryomodules was approved by DOE and that contract also has been awarded. Evaluation of the Best-and-Final Offers (BAFO’s) for the fabrication of the SRF cavities and also for the 4-meter dipole magnet fabrication have been completed and the packages are being prepared for DOE review. BAFO’s have been received for the fabrication of the beamline quadrupole magnets. The Request for Proposals has been issued for the fabrication of the cryomodule space frames and for fabrication of the beam transport “C” dipole magnets. Responses to the RFP’s have been received for fabrication of the beam transport septa magnets. The design package for the motor control center for the upgrade to the Central Helium Liquefier has been completed.
In Hall A, production running for E05-015, a Measurement of the Quasi-elastic Single Spin Asymmetry and E08-005, measuring the transverse asymmetry in the 3He(e,e'n) Reaction, has been successfully completed. A new polarized 3He target cell, tailored to the upcoming experiment E05-102, measuring the transverse asymmetries in the 3He(e,e'd) reaction, is being installed.
The accelerator was running relatively well with some down time. EES fixed the Arc4 box supply, which tripped a few times. EES also fixed the Hall B box supply, which had a failed Silicon-Controlled Rectifier (SCR). On Tuesday, the day shift was spent on Beam Studies. On May 6, CHL and some magnet box power supplies went down, most likely due to lightning strikes. The GUN2 cathode was reactivated for better performance. Some maintenance work was done on radio frequency (RF) cavities. On May 8, Hall A was changed from pass 3 to pass 2. Beam ran well over the weekend.
Additional recognition came from Prof. Pierre Sivikie at the University of Florida, who toured the FEL facility on Monday. In the early 1980’s, Sivikie published seminal papers on axions and their responsibility for dark matter. His theoretical study led to the creation of the ongoing Cern Axion Solar Telescope (CAST) experiment, and led to Karl van Bibber (now at the NPS) to propose the light-shining-through-walls class of experiments, such as the one funded by ONR at the JLab FEL.
The FEL made progress on the UV beam line, with both 6F and 8F regions now under vacuum. Despite the 4 days of rain this week that prevented work on the LCW line from the South Linac building to the FEL, some progress was made: Pipes have been connected to the south linac building and are laid half way to the FEL.
JLab's Safety Numbers
128 Days since Last Recordable Accident (JLab record: 331)
JLab Calendar of Events
May 20: JLab Annual Run-A-Round
Environment, Safety, Health & Quality
In recognition of Electrical Safety Month, OSHA is reminding employers and workers about the importance of staying safe when working with electricity on the job. OSHA's topic page on electricity features information about standards, hazards, and possible solutions to those hazards: http://www.osha.gov/SLTC/electrical/index.html.
OSHA’s topic page on the Control of Hazardous Energy (Lockout/Tagout) describes why this practice is important to protect workers from the unexpected startup of machinery or the release of hazardous energy during service or maintenance activities: http://www.osha.gov/SLTC/controlhazardousenergy/index.html.
Computing and Networking Infrastructure
JLab E-Mailing List Replacement, May 18
IT Helpdesk Summer Hours
User Audit Ongoing
User Security Awareness Training
Training Class for ECAD Designers
JSA Awards Graduate Fellowships
Ready, Set, Go! to the Run-A-Round on May 20
For details about Wednesday's event, see the May 2009 On Target story at: https://www.jlab.org/news/ontarget/latest