Latest Weekly Briefs

Wed, 2016-05-18 17:17

Jefferson Lab Weekly Briefs
May 18, 2016

12 GeV Upgrade

Cryogen lines and the main current buss for the CLAS12 Torus magnet have been connected inside the cryogenic service tower, followed by attachment of the thermal shield and cryostat, completing the magnet’s vacuum enclosure. Leak checking and a first trial pump-down of the torus are underway, with a number of small leaks in seams welds found and repaired. In parallel, service attachments to the cryogenics distribution can are underway. The second review required prior to the Torus cooldown, which will examine this can plus all the supporting warm gas piping and vaporizers, is set for mid-June. The in-field checkout is ongoing for the control logic and instrument readouts for the magnet and the various display, control and alarm screens for operators, both expert and regular, are being tried out.

The fifth, or “Shield,” coil for the CLAS12 Solenoid has completed winding, a step which completes coil winding for all magnets being manufactured for the 12 GeV Project.  The shield coil is being fitted with its mold for epoxy impregnation and being readied for sealing and leak-checks of this mold. The two inner coils have been shrunk-fit into the bobbin already carrying the two intermediate coils for the solenoid, which thus forms the main coil winding pack for the solenoid. The parts and fixturing for the solenoid cold mass assembly have arrived at the vendor in anticipation of the next assembly step after shield coil epoxy impregnation is complete.

Center for Theoretical and Computational Physics

A new theory paper derives generalized Quantum Chromodynamics methods for relating very small and very large transverse momenta of particles produced in high-energy collisions. Since high and low transverse momenta are related to different facets of QCD, this will be crucial for efforts to understand hadron structure and nonperturbative aspects of quark-gluon behavior. The results can be used in the study of semi-inclusive deep-inelastic scattering experiments planned at Jefferson Lab.

Engineering

The Alignment group has been working in many areas throughout the machine. When the tunnel was opened up in April, a complete survey of the arcs and linacs in the accelerator was accomplished. This survey is required to monitor movements (seasonal growth and contraction) of the physical tunnel. The group completed as-found measurements of the Hall D target, start counter, Forward Drift Chamber and Central Drift Chamber. Additional support for the LCLS-II fixturing rails/cold mass support system was done. The group supported the Upgrade Injector Test Facility project, measuring the electrode gun and layout in the enclosure. For Hall C, the Super High Momentum Spectrometer sieves were fiducialized and mapping of the bending magnet commenced. Group members also carried out final alignment in Hall B in preparation for the PRad run. Preliminary work on the Low Energy Recirculator Facility’s Darklight project was also started.

The Magnet Measurement group worked to:

  • Repair leaks in JC5A13 and QB1A03 in the accelerator;
  • Replace magnet DB2L26;
  • Take apart/rebuild/replace pole in arced-out magnet JC5A14;
  • Prototype Hall B Torus magnet measurements with Hall B and MM staff; and
  • Measure/map various dipoles/solenoids/quadrupoles for the UITF.

Engineering

The Alignment group has been working in many areas throughout the machine. When the tunnel was opened up in April, a complete survey of the arcs and linacs in the accelerator was accomplished. This survey is required to monitor movements (seasonal growth and contraction) of the physical tunnel. The group completed as-found measurements of the Hall D target, Start counter, Forward Drift Chamber and Central Drift Chamber. Additional support for the LCLS-II fixturing rails/cold mass support system was done. The group supported the Upgrade Injector Test Facility project, measuring the electrode gun and layout in the enclosure. For Hall C, the Super High Momentum Spectrometer sieves were fiducialized and mapping of the bending magnet commenced. Group members also carried out final alignment in Hall B in preparation for the PRad run. Preliminary work on the Low Energy Recirculator Facility’s Darklight project was started

Jefferson Lab Calendar of Events

May 16-19: Precision Radiative Corrections for Next-Generation Experiments workshop
May 23-26: Service Award Ceremonies
May 30: Memorial Day holiday, Jefferson Lab closed
May 30- June 18: Hampton University Graduate Studies Program
June 20-22: Users Group Workshop and Annual Meeting

Environment, Health, Safety and Quality

Changing Definition of "Best Interest" Promotes Safety for All
Life and work are complex; we can't consider the full range of options for the hundreds of decisions we have to make every day. So, we tend to develop patterns of behavior, or habits, that help us manage these challenges. As creatures of habit, we are generally resistant to change. For example, if we cannot reasonably foresee how a change will affect us (either positively or negatively), we tend to resist change or treat that change neutrally, at best. If we believe the change is in our best interest, we are motivated to accept it. It is no surprise, then, that safety performance is a direct result of individual employee perceptions, decisions and practices.

This is why we pay attention to our safety culture, why we try to promote the positive, and why we try to change the negative. This is also why we carefully assess incidents and events to look for patterns and behaviors that were causal or contributing factors. One pattern of behavior shows up consistently in accidents, incidents and events: employees who encounter work conditions inconsistent with their work plan tend to push ahead with work. Instead of stopping and re-evaluating the work, we tend to push ahead despite unanticipated (and unevaluated) hazards. Some of us are making a personal decision that it is in our best interest to continue working even if a work plan does not (any longer) support safe work. We do this because we perceive that it is in our best interest to complete the task rather than to stop and reevaluate.

To address this problem, we must first believe it's a problem. No one wants to experience an injury or intentionally contribute to a co-workers' injury. Yet, to change our behavior, we need to change what we perceive as "best interest." Let "best interest" be defined as "working for a safe outcome for us and our co-workers" instead of "completing the work as first priority." When we can do this consistently, we will overcome one of the most stubborn remaining barriers to sustained safety performance.

Announcements

Reminder: Jefferson Lab Shipment Import and Export Requirements
For any shipment being imported to Jefferson Lab, it is mandatory that the lab’s customs broker, Team Worldwide, be contacted by the vendors’ shipper to arrange all shipping from their facility to the lab (Team Worldwide contact information is listed below). Contacting Jefferson Lab’s customs broker will save time and facilitate movement of the property to Jefferson Lab faster and at less cost. Should a vendor not contact Team Worldwide, and additional costs are incurred due to delays for storage or lengthy stays in port, those costs will be deferred to the originator (vendor) who initiated the shipment.

In addition, all lab shipments should be coordinated with Jefferson Lab Shipping and Receiving/Property to ensure all shipping and property requirements are met. Overseas shipments can be complicated based on the length of time a piece of property will be offsite, the cost of the item, and what the item is being used for or what work is being performed on the item. Jefferson Lab Shipping and Receiving/Property personnel can assist Jefferson Lab staff in complying with all shipment obligations and in coordinating with Team Worldwide to ensure a successful delivery overseas. If you will need to ship an item overseas, contact Jefferson Lab Shipping and Receiving/Property as soon as practicable to begin the process.

If you have any questions about these requirements, contact Barbara Rice at x7238 or Christian Whalen at x5899.
Team Worldwide
Attention: Brandon Share
Brandon.share@teamww.com
Cell phone: 757-880-1982
Office phone:  757-565-5070

New Security Notices and Weapons Restrictions Reminder
Jefferson Lab has installed revised legal notices at the entrances to Jefferson Lab Federal property. This includes the campus, Accelerator Site, and Central Material Storage Area. The security signs are larger; they are more easily read from the road; and the signs’ key features are highlighted by symbols. The new signs meet Department of Energy requirements and, like the old signs, will inform people of the use of recorded video and that vehicles and closed containers are subject to inspection.
 
Jefferson Lab employees and visitors are reminded that DOE and JSA policy strictly prohibit weapons on the Jefferson Lab campus. This includes ammunition of any kind or quantity. Full compliance with this policy ensures we can maintain the open campus environment we all enjoy and benefit from.
 
Questions about prohibited items or other security issues may be directed to Kris Burrows at x7548 or burrows@jlab.org. To view a graphic of the revised security signage, see the full memo online.
       
All-Hands Meeting Materials Now Available for Viewing
On May 4, Jefferson Lab Director Hugh Montgomery conducted an All-Hands meeting. If you weren’t able to attend one of the two sessions, click the link for information to access the recording.

Test of Public Address System Today at 5:30 p.m.
Jefferson Lab will conduct the monthly test of its Public Address (PA) System – the live audible announcement feature – available through the lab’s Cisco phones. This monthly operational test of the system occurs at 5:30 p.m. on the third Wednesday of each month. No actions are required or expected from members of the lab community. For more information, see the posted memo.

Run-A-Round T-Shirts Available for Distribution and Special Order until May 20
This year’s winning design was submitted by the Diversity Committee and is titled “Diverse in Community, United in Science.” Run-A-Round volunteers — you worked hard — don’t forget to redeem your vouchers at the front desk of CEBAF Center for your free T-shirt. Users and staff who participated in the run are also encouraged to submit their bib T-shirt coupon (eligible if there is a colored sticker with the word “rainbow” attached). Also available for purchase, at very reasonable prices, are T-shirts in sizes XS to 4XL in styles for men, kids, women v-neck, and hoodie sweatshirts (zip and non-zip). Come by the front desk to see samples and fill out an order form.

Workshop: Strategies for Planning, Developing, and Writing Large Team Grants
Karen Eck, Assistant Vice President for Research, from the Office of Research at Old Dominion University will  address issues faced by researchers in transitioning from smaller group or individual grants to larger team grants, which offer unique challenges and are more complex to plan, develop and write. Learn about strategies for developing competitive partnership proposals and about project management essentials, such as starter templates, the elements of a successful narrative and "red team" reviews, as well as scheduling and task assignments for proposal planning. The workshop will take place Friday, May 20, 10 a.m.-noon in CEBAF Center room F224-225. No advance registration required.

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.