Jefferson Lab Weekly Briefs
June 8, 2016
12 GeV Upgrade
Bids have gone out to potential vendors for the downstream support structure for the Central Time of Flight detector for CLAS12 and for the installation arm and transport strong-back needed to install CTOF slats into the solenoid magnet bore. These are the last outstanding items needed to complete the detector fabrication part of CLAS12. The other item needed for the CTOF, the light fiber bundle to distribute monitoring laser light to the CTOF slats, is due to arrive this month. Cabling and in-situ checkout of the installed six sectors of the Low Threshold Cerenkov Counter and four sectors of the Forward TOF panel 2 is complete. The remaining fast electronic modules, the crate trigger processors, needed to complete the DAQ and triggering systems for Hall B are in mass production this month and are expected to arrive for production testing during July. Finally, the mechanical design and construction blueprints are being produced for the tungsten-based Moeller-electron shield, which is needed to shield the downstream detectors in CLAS12 from that source of background hits.
Work continues in France on the magnets for the Super High Momentum Spectrometer. The outer vessel of the dipole magnet has received a temporary seal, and pumps are in use to create a vacuum inside it. The volume is large, and the joints requiring a seal are long, so this process has been difficult and time consuming. Once it is accomplished, the vendor can verify the integrity of the nitrogen and helium systems inside the magnet. A small leak in a part of the Q2 magnet's nitrogen system has delayed installation of its bore tube and vacuum tank end flanges, but the main helium and nitrogen supply and return pipes, which enter through the neck of the magnet, have been welded, checked and covered with insulation. The last piece of cryogenic piping in Q3, a small bellows, is being welded into place. In Hall C, plans are being made for receiving the dipole magnet’s cryo-control reservoir in early June and for rigging the heavy magnet onto the spectrometer and connecting it to the CCR. The dipole and Q2 are expected to arrive in August. The SHMS collimator box has been installed, and work is proceeding on improvements to the magnet helium gas systems on both spectrometers.
Jefferson Lab Published Journal Articles, May 31-June 3
Remember to submit your papers for approval to the Jefferson Lab Publications database.
American Physical Society Dissertation Award in Nuclear Physics Call for Nominations
Facilities Management and Logistics
Inventory of Personal Property Is Underway
If you have items on your property list that you no longer need, you may excess these items via the website. Simply click on the tag number for the item, and then click the "Relocate/Transfer/Excess this item" button. You can access your property list via the search function here.
If you would like to excess any other items that are not on your property list and do not have a numbered (F123456) property tag -- such as desks, chairs, old trailers, carts, spools, etc. -- you may do so using the link.
Property Custodians are reminded that you may not dispose of items in the Central Material Storage Area without first communicating with Property Management. If you need assistance, contact Danielle Tarver, x7025, or Tim Wagner, x7348. Items in good condition that are excessed via the processes above are being made available for re-use by Property Management for Jefferson Lab Property Custodians. These items are available only for use on-site for Jefferson Lab business purposes and are still Government Property.
Environment, Health, Safety and Quality
Occ Med Guidance: Returning to Work After a Respiratory Infection
Information on 3D Mammography
Computing and Networking Infrastructure
Upcoming Jefferson Lab Pager Audit
Volunteers Sought to Help During Science Camp
Pressure Systems Safety Awareness (SAF 130A) Training June 15 Session Location Changed
Jefferson Lab Calendar of Events
June 20-22: Users Group Workshop and Annual Meeting
2016 Summer Physics, Science Education, Enrichment Programs at JLab
|JLab Weekly Briefs is an ongoing publication providing information on the status of safety, accelerator operations, experiments, free-electron laser, reviews, upcoming activities and special events. Deadline for submission is every Tuesday by 10 a.m. Submit new items to: Public Affairs or contact Kandice Carter at x7263.|