Jefferson Lab Weekly Briefs August 4, 2010
Jefferson Lab Weekly Briefs
August 4, 2010
12 GeV Upgrade
The first two niobium cavities for cryomodule construction have been received from the vendor; inspection of those units has begun. Nine of the cryomodule helium vessels (eight are needed for each cryomodule) have been received. The first cryomodule vacuum vessel has been received and is being inspected. Low-level radiofrequency fabrications remain well ahead of schedule. The final shipment of beamline quadrupole magnets has been received. Five more 4-meter beam transport dipole magnets have been shipped from the vendor. All open issues have been closed from the review of the “box” power supplies for the beam transport dipole magnets. Testing of the first article klystron has been delayed until early August.
JSA Initiatives Fund Proposals Due Friday
Pre-Applications Due for Early Career Research Program
The accelerator was running well. More than three shifts were used for beam studies and maintenance when the halls did not take beam. On Thursday evening, a storm dropped the injector and the radiofrequency system in the north linac to restricted access; operations personnel quickly recovered the machine. Over the weekend, 135 microAmps continuous wave beam was established to the Hall C beam dump for Q-weak.
Last week, the FEL team successfully transported 1milliAmp of continuous wave beam (18 milliHertz and 60 picoCoulombs) through the ultraviolet electron beamline. This success, on as short a timescale as it was achieved, is due to a remarkably thorough and careful installation process by the team. FEL staffers are now engaged in the installation of the small-gap wiggler chamber and diagnostic equipment.
Computing and Networking Infrastructure
Redhat Enterprise Linux Version 3 Support Ending
New Central Material Storage Area Opens
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JLab's Safety Numbers
19 Days since Last Recordable Accident (JLab record: 331)
JLab Calendar of Events