LARP RC1 Prototype Conceptual Design Review-12/15/2005 (40)
9:00:00 AM-4:00:00 PM
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Agenda 0900-0910 Tor Raubenheimer - Welcome & Charge to Committee 0910-1000 Tom Markiewicz - Project Overview (30"+20") 1000-1030 Ralph Assmann - CERN comments on collimation system requirements, the RC1 design and prototype plan, and CERN plans for Phase II collimator design (20"+10") 1030-1050 Lew Keller - Energy Deposition Studies (15"+5") 1050-1110 Coffee Break 1110-1130 Yunhai Cai - Collimator Efficiency Studies (15"+5") 1130-1230 Eric Doyle - Prototype Engineering Studies (30"+30") 1230-1330 Working Lunch with Discussion at 1330-1400 Eric Doyle - RC1 Construction & Test Plan (15"+15") 1400-1430 All - Discussion 1430-1530 Committee - Assemble Report Notes Committee - Closeout 1600 Adjourn |
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Committee Members Dr. Louis R. Bertolini - Lawrence Livermore National Lab Dr. Alexander Makarov - Fermi National Accelerator Lab Dr. William C. Turner - Lawrence Berkeley National Lab Visitors Dr. Ralph Assmann - CERN, LHC Collimation Project Leader Terry Anderson - Fermilab Engineering Group - Closeout SLaC Invitees Josef Frisch Gordon Bowden |
1 .) id=115 Tor Raubenheimer -- Welcome & Charge to Committee (10 min)
| Summary: SLAC has proposed to US LARP (LHC Accelerator Research Program) and CERN a design for so-called secondary metal collimators for the LHC. Calculations imply that these will be required if the LHC is to reach its nominal 1E34 luminosity. SLAC has extended a design that was prototyped for the e+e- NLC. This new design is ready to begin the prototype construction. As envisaged, these will be ~75cm long 136mm diameter cylinder jaws which need to be engineered for ~12kw/jaw DC heat loat with 10 sec. transients at up to 60 kW/jaw. Distortion must be minimized and guaranteed to be in a direction away from the 350MJoule LHC beam. As the collimator surface can be damaged during rare "asynchronous beam aborts" the jaws can rotate up to 360 degrees. One or more prototype devices are required to test the thermo-mechanical performance of the design. Before investing in the construction of these prototypes SLAC and LARP management would like an external review of the design. In this context, the committee is asked to comment in three areas: 1) Is the design that is presented mature enough that the project can proceed to construct the first rotatable collimator prototype, referred to as RC1? Has the impact of the secondary collimator on collimation system efficiency been adequately explored? Have alternative materials and designs been adequately explored? Will the device as proposed be likely to meet its mechanical tolerances under the projected heat load? Please also comment on possible technical difficulties and risks not foreseen by the project and suggest other possible approaches or materials if your experience indicates they should be explored. 2) Review the mechanical and thermal features of the proposed prototype from an engineering perspective and comment on whether there are technical difficulties that would keep the prototype from meeting its requirements. 3)Is the construction plan for the RC1 prototype fabrication reasonable and are the proposed tests adequate to answer the performance questions for which it is being constructed? Taking into account that this is a proposal to begin building several prototypes and not an engineering plan for a series production that will be installed in the LHC, are the proposed budget, schedule and milestones adequate. We would appreciate knowing your the committee's opinions verbally at the close of the day and request that they also be summarized in a short letter or note at that time or very shortly afterwards. |
2 .) id=116 Thomas Markiewicz -- Project Overview & Collimator Requirements (30 min)
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3 .) id=117 Ralph Assmann -- CERN prospective and CERN plans (20 min)
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4 .) id=118 Lew Keller -- Energy Deposition Studies (20 min)
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5 .) id=119 Yunhai Cai -- Collimator Efficiency Studies (20 min)
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6 .) id=120 Eric Doyle -- Prototype Engineering Studies (45 min)
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7 .) id=121 Eric Doyle -- RC1 Construction & Test Plan (30 min)
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