Jefferson Lab Weekly Briefs April 30, 2008
Jefferson Lab Weekly Briefs
April 30, 2008
12 GeV Upgrade
The R&D task to re-measure the higher-order mode (HOM) damping in the 12 GeV Superconducting Radio-Frequency (SRF) cavities is proceeding; re-assembly of two cavities into the horizontal testbed (HTB) will occur in approximately two weeks, with additional measurements in the Cryomodule Test Facility then following.
Preparations are underway for the July 22-24 Independent Project Review by DOE. The primary focus of the preparations is ensuring that the criteria for Critical Decision 3 Approval (“Start of Construction”) are well in hand.
In Hall A, production running for experiment E04-007 (Pi-Zero Electroproduction near Threshold) continues to progress smoothly.
Overall, the accelerator is running smoothly, but it has had its bumps. Early on, a little over a shift was lost due to a vacuum problem traced to a corroded connector for a vacuum ion pump. While restoring from the vacuum problem, the Arc 1 power supply would not stay on, causing the loss of another shift. A definite cause was not found, but it is now working, and a spare supply has been procured from the Free-Electron Laser and is in place to be swapped out if needed. Seasonal ground temperature changes are causing the accelerator to grow ever so sightly as noted by the beam pathlength adjustments that are being made during almost every shift. The rest of the week and weekend were very quiet with long stretches of continuous beam delivery.
JLab Spring Cleanup Week: May 5-9
Excessing Unused JLab Property Goes Electronic
Property listed in your custodian inventory may now also be excessed electronically. Go to your Property Validation list to initiate the electronic excessing process of tagged property on your inventory list. Property custodians may access their property list from the Property page. Click on Property Validation at the bottom of the Resources listing.
Reporting Theft Results in Quick Recovery of Snatched Computer
Donate to Tornado Victims, Not Scam Artists
First Class Mail Rate Increase
Environment, Safety, Health & Quality
Spring is the time when people engage in cleanup chores. Often materials that have sat in garages and basements for extended periods of time are now "rediscovered." While most items pose no risk, it is not uncommon for people to find items they cannot identify or items that are in damaged containers. People also may not know the correct way to handle or dispose of items that may pose a risk to others or to the environment. Here are a few things to keep in mind when going through your garage or basement:
Other household chemicals such as pesticides, lawn and gardening chemicals, solvents, thinners and other items not listed above must be retained and disposed of at an appropriate recycling facility. For information on how to dispose of household hazardous waste in the local area, visit the Earthwise webpage.
Computing and Networking Infrastructure (CNI)
Attention JLab Wireless Network Users
EVO and VRVS changes
JLab's JTalk server going down for maintenance
JLab's Safety Numbers
224 Days since Last Recordable Accident (JLab record: 319)
JLab Calendar of Events
May 5-9: JLab Spring Cleanup Week
JLab Education Calendar