Accelerator Update

LEGS Dismantled During Spring Shutdown

June 1, 2007

Jim Murphy
Accelerator & Operations Division
jbm@bnl.gov

Archives:
February 2008
November 2007
June 2007

The spring maintenance shutdown has just been completed safely and successfully due to the excellent teamwork from the staff in the newly formed NSLS Accelerator & Operations and Experimental Systems Divisions and the support of the BNL Electricans, Riggers, and Masonry staff. Removal of two X5 LEGS dipole magnets and the entire tagging cave from the interior of the X-ray ring tunnel were two of the larger tasks accomplished during the spring shutdown. It is a tribute to all involved that the many complex tasks were executed safely due to thorough work planning and adherence to safety guidelines. With the conclusion of the LEGS experiment, the X-ray ring user community will benefit from an increased electron beam lifetime resulting in an increase of the integrated photon flux. The VUV and X-ray rings remain on target to exceed 95% reliability for FY07. The new long-range operations schedule for the period of August to December 2007 has been approved by the NSLS Chairman and be can found at http://www.nsls.bnl.gov/facility/schedules/.

To meet DOE compliance guidelines, Electrical Equipment Inspections (EEI) of the “high-hazard equipment” in the accelerator systems were also an important feature for this maintenance period. Inspection of a large fraction of the accelerator equipment was completed and the remaining items will be addressed in the short maintenance periods. Inspection of beamline equipment that began during the shutdown will continue throughout the year. Thanks to the team of EEI inspectors and the cooperation of all who compiled the extensive lists of equipment to be examined. Roughly a dozen circuit breakers around the NSLS were upgraded to bring the NSLS infrastructure in compliance with the DOE Worker Safety policies (10CFR851).

To continue to provide the highest level of support and development of the NSLS accelerator complex, Misha Fedurin will assume the role of Machine Physicist for the X-ray ring effective June 1, 2007. Misha has been training for his new role alongside Igor Pinayev since Misha’s arrival at the NSLS in November 2006. He has extensive experience in insertion device development from his doctoral work at the Budker Institute of Nuclear Physics and he spent the last five years advancing his accelerator skills as the Machine Physicist for the CAMD ring at LSU. Misha will take over his new role from Igor Pinayev, who has joined the NSLS-II project. Many thanks to Igor for the outstanding job he has done on both the VUV and the X-Ray rings and for his expert tutelage of Misha on the intricacies of the X-ray ring. Please welcome Misha in his new role and wish Igor continuing success with the NSLS-II project.

Looking ahead to the fall/winter shutdown, the main task will be the installation of the X9 mini-gap undulator and the X9 front-end components.