12 GeV Upgrade
Assembly of the 10th and final C100 cryomodule has been completed. Acceptance testing of the 9th C100 is underway in the Test Lab. The linacs have been taken to 2 Kelvin, and testing of C100 cryomodules in the tunnel has resumed in the North Linac. The production run for the new trim supplies has started. Commissioning of the new 4.5 K coldbox for the Central Helium Liquefier #2 is underway in collaboration with the vendor. Installation is underway for the 10 large BCOM dipole magnets in the spreaders and recombiners. Procurement of the electronics for the stripline beam position monitors has started.
Pursuant to a recommendation in the Final Report concluding the DOE Independent Project Review (IPR) of the 12 GeV CEBAF Upgrade Project held in November 2012, a Director’s Re-Baseline Review of the 12 GeV Upgrade Project was convened at JLab April 8-10. A team of 11 experts and one observer, led by Edward Temple, Jr., reviewed the status of the multiple, superconducting magnet sub-projects and the completeness and defensibility of all components of the project’s Estimate to Complete. The review helped identify areas of the re-baseline proposal in need of improvement in preparation for the next DOE IPR of the 12 GeV CEBAF Upgrade Project scheduled for May 7-9 at JLab.
Registration Open for Annual Users Group Meeting
The 2013 JLab User's Group Annual Meeting will take place on May 29-31. The program includes a variety of physics talks, presentations from the Users Group Board, laboratory management and funding agencies, and talks from the new APS fellows and prize winners. Register now online.
Annual Meeting Registration Is Free for Students
The Jefferson Science Associates Initiatives Fund has again sponsored waiving student registration fees. There will be special lunch discussions for graduate students, and free food will be available. The poster competition continues, with a first prize of $1000, a second prize of $500, and a third prize of $250. Poster competition abstracts must be emailed to Lorelei Chopard by Friday, May 17. For more information, contact Natalie Walford.
The FEL team received $3 million capital fabrication funds from Virginia, which will be used to refurbish the F100 cryomodule and construct and install a new buncher system in the injector. Charge codes were allocated and turned on. The schedules are still being worked out, but the hope is that both the buncher installation and cryomodule replacement can occur in the first quarter of 2014.
The team received more vacuum hardware for the versatile vessel that will allow FEL and surrogate laser testing of the guided mode resonance (GMR) outcoupler mirror. Antireflection-coated zinc selenide viewports were ordered to do thermographic profiling of the optic during laser irradiation, using the FLIR thermal imaging camera.
Center for Theoretical and Computational Physics
A new model for nucleon generalized parton distributions (GPDs) has been developed, which takes into account the subtle relationship between the two basic nucleon GPDs, denoted H and E. The most important difference compared with previous simplified models is the change of the value of the H GPD at the "border point," when the fraction x of the initial proton momentum carried by the struck quark is equal to the Bjorken scaling variable xBj. This value plays an important role, since it determines the magnitude of the single-spin asymmetry in deeply virtual Compton scattering that was measured in several experiments at JLab.
The Document Control group reports that the new E-Sign process for engineering drawings has been in place for ten months now. The results have been significant. The average cost of supplies for all of Document Control since initiating the new E-Sign method has dropped more than 50 percent. The number of documents submitted for approval have increased by greater than 50 percent, while the number of monthly plotted drawings has dropped by a factor of 20.
JLab Calendar of Events
April 17: Teacher Night at JLab
April 18-20: Q-weak Collaboration Meeting
April 22: Safety Shoe Vendor onsite
April 23: Colloquium and Public Lecture: Xiangdong Ji
April 30: Colloquium and Public Lecture: Fabiola Gianotti
April 30: Science Series: The Higgs Boson and Our Life
Environment, Safety, Health and Quality
Resolving ES&H Concerns
To ensure your welfare and productivity, JLab has several mechanisms for employees, or anyone who comes into contact with the lab, to report issues potentially affecting the safety of workers, visitors, lab neighbors or the environment without fear of retaliation or reprisal. ES&H Manual Chapter 2310 lists a variety of mechanisms for resolving and reporting ES&H concerns and for preventing similar concerns from occurring in the future. Here is a list of the options you have for resolving an ES&H concern:
If possible, resolve the ES&H concern yourself;
If you are unable to resolve the concern yourself, refer the concern to your supervisor and management chain using the mechanisms outlined here;
You may also consult your Safety Warden, Division Safety Officer, your representative to the Worker Safety Committee, or contact an ESH&Q staff member directly for any ES&H concerns you may have;
If you would like to remain anonymous, or if you feel that it is more appropriate, use JLab’s Employee Concerns Program;
If one or more of the above steps have not resulted in resolution of the concern, or if you feel that it is more appropriate, you may also use the formal DOE Employee Concerns Management System hotline at 800-676-3267; or use DOE's Differing Professional Opinion process through the form found in DOE Order 442.2.
Once your concern has been addressed, communicate any lessons learned to your staff, co-workers, supervisors and your Division Lessons Learned Coordinator. ES&H Manual Chapter 2310 offers more information on concern resolution.
Take Our Daughters and Sons to Work Day Is April 25
Take Our Daughters and Sons to Work Day is set for Thursday, April 25. JLab has no formal plans for the day. However, JLab parents/grandparents are welcome to bring their school-age children/grandkids (8-18 years of age) to work for all or any part of the day. Parents are responsible for their children while they are at the lab. For more information, see the full announcement.
Colloquium & Public Lecture: Exploring the Proton as It Travels at the Speed of Light
In high-energy scattering processes, we study the proton as it travels at the speed of light. Due to Lorentz time dilation, the strong interaction between quarks and gluons slows down considerably, and the proton appears as a collection of non-interacting partons. In this talk, Xiangdong Ji, a professor of theoretical physics at the University of Maryland, will discuss to what extent one can use this picture to describe various properties of the proton, including its spin, and visualize the results of high-energy scattering experiments at JLab 6 and 12 GeV and other facilities worldwide. He will also discuss how to directly calculate the properties of partons using the large scale numerical simulations of QCD. The colloquium will be held in the CEBAF Center auditorium on April 23 at 4 p.m.
JLab Celebrates National Library Week: April 15-19
Visit the library during national library week and enter your name into a daily drawing to win a Starbucks gift card! Celebrate with library staff through events scheduled all week. See the full announcement.
JLab Records and Information Management Fact of the Week
A few years ago, a Yahoo! survey found that one third of all people would rather clean their toilets than clean out their email inbox. Keeping email longer than necessary may not seem like a big deal to most people, but keeping any record longer than legally required can be a liability to the lab. Take a moment each week to clean out your inbox of transitory records mentioned at this link. If you have other emails you need to manage but are not included in the list, contact Kim Kindrew.
RIM Trivia Question of the Week
The term which has come to mean network abuse via junk email and junk postings to message boards most likely originated from a skit during which a group of Vikings sing the following song in a cafe: "Spam, spam, spam, spam, spam, spam, spam, spam, lovely spam! Wonderful spam!" What is the name of the group that performed the skit? The first correct response received at firstname.lastname@example.org wins a Starbucks gift card! (Winner will be notified no later than 5 p.m. Friday following publication of Weekly Briefs. Limit one gift card win per person.)
Congratulations to Chris Wicker for his quick response to last week's question: Paper is an example of a "medium" for recorded information, as are flash drives, CDs and tapes. The earliest known form of writing is cuneiform, dating back to the 30th century BC. Upon what medium was cuneiform written? The answer was clay tablets.
Education Seeks Projects for Summer Honors Interns
Seven outstanding high school students have been selected to participate in the lab's High School Summer Honors Program, which will be held at the lab June 24-August 2. The students are currently high school juniors and seniors and have expressed interest in pursuing scientific and technical careers. Lab scientists, engineers and other technical managers who are interested in serving as a mentor to high-achieving high school students and have a project, or number of projects, to be accomplished this summer, are asked to send a description of the work to be assigned or any questions you may have about the program to Brita Hampton by May 1. The students will be required to develop a poster about their project and present it during a poster session.
Use On-Hook Dialing to Stop 911 Misdials & Wrong Numbers
Telecommunications staffers encourage everyone at JLab to use the on-hook dialing feature (explained here) available on the Cisco IP phones, in order to eliminate 911 misdials and to reduce instances of misdialing other phone numbers.
Multimeter Missing from TED High Bay Work Area
A multimeter is missing from the Physics Division's Hall A Detector Assembly area in the Technology and Engineering Development (TED) building (Bldg. 55) High Bay area. It was last seen in its assigned work area in late March. For a picture of the missing instrument and contact information if found, see the full announcement.
Tracking Thomas at JLab
Little Thomas is visiting all corners of the JLab campus. If you can identify his location this week, email Kandice Carter with your guess. Guesses are accepted through Friday.
Harry Fanning correctly guessed the location for April 10. Honorable mentions go to Kurt Macha, Jim Follkie and Dick Owen. Check out flickr for a better view of his last location and this week's new mystery photo.