1 / 27

MICE – the UK Perspective

MICE – the UK Perspective. Rob Edgecock RAL/CERN-AB. Introduction UK Contributions Location New beamline New infrastructure Safety and effect on ISIS Cost to the UK Conclusions. Introduction. MICE is very important for the UK and CCLRC:. UK involvement in NF started in 1999

sivan
Télécharger la présentation

MICE – the UK Perspective

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MICE – the UK Perspective Rob Edgecock RAL/CERN-AB • Introduction • UK Contributions • Location • New beamline • New infrastructure • Safety and effect on ISIS • Cost to the UK • Conclusions

  2. Introduction MICE is very important for the UK and CCLRC: • UK involvement in NF started in 1999 • Aim: build a large component or host the machine • A lot of progress made: - UK HoC Science and Technology committee“Hosting a global facility like the Neutrino Factory would bring substantial scientific and commercial benefits to the UK. While we acknowledge the uncertainty of international decisions many years ahead, we recommend that the Government or PPARC consider developing a long-term strategy for bringingthis facility to the UK”!- Study III possibly at RAL - NuFact’02 at IC - CCLRC biggest group in Europe

  3. Introduction MICE is very important part of this! • Crucial for the Neutrino Factory • Increases UK (University) involvement in NF R&D • Demonstrates UK capabilities • Brings NF-interested physicists & engineers to the UK MICE is unique! • Never before have 142 physicists/engineers come to the UK for particle physics MICE is a major opportunity for PP and accel R&D in UK

  4. Layout, services, controls Beam Detectors Focus coil unit Cryogenics RF power UK Contributions Infrastructure Software Experiment contributions: discussed earlier

  5. HEP Test Beam HALL R5.2 Location RAL Harwell

  6. Beam Line • Created using ISIS: - 800 MeV proton RCS - Pulsed at 50Hz - 2 bunches, 100ns long separated by 230ns - 240kW • Already produces beam • Uses internal Ti target • Feeds quad channel in R5.2 52m

  7. Old Beam Line

  8. Hall: L = 47 m W = 12 m H = 8 m S = 564 m2 V = 4512 m3 Two overhead cranes (8 tonnes each) Old Beam Line

  9. New Beam Line Requirements: P< 450MeV/c backgrounds < 10% few muons per s Modifications required to achieve this: • Increased particle flux  smaller collection angle: 40o  25o higher production energy: 620MeV  800MeV

  10. New Beam Line • Better signal/background  currently: >300MeV/c – all protons <300MeV/c – mainly pions (at 200 MeV/c: 75% , 19% , 6% e)  SC decay solenoid (from PSI)  or quadrupole decay channel

  11. New Beam Line • Improved reliability  new target mechanism new magnet power supplies new control system • Better safety  more shielding real security fence real beam dump! Performance: Rate depends momentum at 200MeV/c  3000 /ms for solenoid 300 /ms for quads Background <10%

  12. Layout

  13. Infrastructure Cryogenics: • Required for: - super-conducting magnets for MICE - decay solenoid - liquid hydrogen, etc - VLPCs • Needs new building: - compressor - He and N store • Also used for LH2 • Transfer lines

  14. Infrastructure RF power: - 1MW per cavity, 8MW total - 1-2ms at 1-10Hz - Average power ~1kW/Hz 7651 RS2058 EX SPS TH116 DRIVE TO 4 CAVITIES VIA PHASE SHIFTERS AND 70db COUPLERS POWER SPLITTERS AND CIRCULATORS TH781 EX RAL 4kW 10mW 40kW 4MW 400kW 12kV 5kV 40 kV 20 kV LEVEL CONTROL - a possible scheme ~ SOURCE OTHER DRIVE CHAIN R.A. Church RAL

  15. Infrastructure

  16. Infrastructure Controls and control room: Layout and services: - water - power - lighting - detector layout - detector support - phased installation Hydrogen - safety - detection hardware - igloo - ventilation - interlocks - dump Additional civil engineering - design - hall preparation - hole through ISIS wall

  17. Safety Main issues: • Hydrogen! • Magnets – fringe fields and quenches • Radiation safety – ISIS beam loss • RF – x-rays and dark current • Cryogenics • HV • Vacuum • etc

  18. Hydrogen Critical safety issue! • Cooling channel requires minimum window thickness • Particularly true for cooling rings • Most work done in the US so far • Thin Al windows designed and tested against FNAL safety regulations in US

  19. Hydrogen • Liquid hydrogen used at RAL: moderator in ISIS target station (much smaller volume) Helium Vacuum Hydrogen • Prevents oxygen condensation on cold surfaces after leak through vacuum window

  20. Argon jacket Hydrogen • Corresponding MICE layout: • More windows, degraded performance • Need a true test of a “real” cooling channel absorber • Will need to pass CLRC safety review

  21. Fringe Fields of Magnets Four potential hazards: - effect on ISIS control rooms - effect on ISIS linac and synchrotron - effect on pace-makers - effect on ferromagnetic objects Baseline case 10mT 0.5mT

  22. X-rays and dark current are a strong function of RF voltage. Need to shield, particularly x-rays. X-Rays

  23. Effect on ISIS During construction: • Much work in next long shutdown - competition for resources (staff) - bigger hole in ISIS wall • Much work in preparation and after - competition for resources (2nd target station) During data-taking: • Fringe field on linac - negligible • Decay solenoid field on synchrotron - no problem • Target beam loss - no worse

  24. Cost to the UK

  25. Cost to the UK Changes with respect to proposal: • Cost of new decay solenoid removed • RF contribution re-defined: wave guides  power amps Some totals £k: Materials = £ 7520k Staff for construction = £ 1970k Travel = £ 310k Support/analysis = £ 1100k TOTAL = £10900k

  26. UK Management • UK Collaboration formed (MICE UK): 8 labs, 44 people • UK contact-person: Ken Long (IC) • UK steering group: 1 person/lab, except CLRC • At CLRC: MICE management following formal guidelines - Joint Project Board (Long, Peach, Taylor, Wade) - Interim Project Management Committee - Installation Technical Working Group - Safety Technical Working Group Project Sponsor - Ken Peach Project Leader - Rob Edgecock Project Scientist - Ken Long Project Manager - Paul Drumm

  27. Conclusions • The NF will address questions of fundamental importance to PP and cosmology • MICE is crucial for demonstrating cooling for a NF • Equivalent to Tesla/CLIC Test Facilities • A large and motivated collaboration has formed • This has shown MICE can be built and will work • Total cost ~1% of a Neutrino Factory • MICE is a major opportunity for the UK - build on what’s been achieved - big step towards our aims - increase UK involvement in the NF - bring particle physicists to the UK • The UK has the resources and expertise to provide beam and infrastructure and make big contributions to the experiment

More Related