1 / 24

AWAKE electron source

AWAKE electron source. New Electron Source WP at CERN Base Line Scenario Simulations Diagnostics Questions and Issues Conclusions. Layout of AWAKE Experiment. Layout of Electron source. To be developed in the future. Base line scenario. Base line.

sean-francis
Download Presentation

AWAKE electron source

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. AWAKE electron source • New Electron Source WP at CERN • Base Line Scenario • Simulations • Diagnostics • Questions and Issues • Conclusions

  2. Layout of AWAKE Experiment

  3. Layout of Electron source To be developed in the future

  4. Base line scenario Base line • Use PHIN gun and equipment (convert to copper cathode ?) • Klystron and Modulator from CTF3 • Get booster from Cockcroft/Lancaster collaboration (specs from CERN) ? • Additional equipment needed (solenoids, vacuum, wave guides, girders) • Diagnostics, PHIN, CERN, INFN (to be defined) • Beam dynamics simulations, CERN ,Cockcroft ? • Integrated test in CTF2 in 2016, external help welcome • Installation and commissioning into CNGS area in 2017, external help welcome Alternative, upgrade • Look for alternative gun, Califes, Cockcroft/Lancaster, INFN ? • (goal will be ultimate beam performance, tiny emittance, ultra short bunches) • Evaluateperformance, impact and cost

  5. Work package responsibilities Be aware this list is certainly incomplete and preliminary

  6. AWAKE – INJECTOR MODULE Quadrupole Magnet Horizontal and Vertical Corrector Magnet YAG Slit YAG Booster Linac 1m long RF Gun Beam Direction Synthetic Granite Girder Ion Pump ? Ion Pump Support Pedestal Proposal by STFC Daresbury

  7. AWAKE electron sourceschematic Klystron Incident, Reflected Power and phase A,f Spectrometer Laser +Diagnostics Incident, Reflected, transmitted Power E, DE MTV Matching triplet FCT Emittance FC MS BPR BPR BPR VPI RF GUN MTV, Emittance Corrector Accelerator Length ~ 4 m

  8. Awake electron beamrequirements

  9. Awake simulations Phin gun, 20 MV/m structure, 0.1 nC, 1 mm 3 ps laser

  10. Awake simulations Phin gun, 20 MV/m structure, 0.2 nC, 1 mm laser

  11. Awake simulations Phin gun, 20 MV/m structure, 0.2 nC, 1 mm laser, 1 ps laser

  12. Awake simulations Phin gun, 20 MV/m structure, 0.1 nC, 0.5 mm laser

  13. Awake simulations Phin gun, 20 MV/m structure, 0.1 nC, 0.25 mm laser Many variants are possible Clear laser and beam parameter specification are needed for the simulations Should define reference scenarios for the simulations

  14. Booster structure Some rough numbers 1 m long constant gradient structure f= 2998.55 MHz Q ~ 15000 r/Q ~ 70 MW DV= 15 MV Tf= 280 ns, 2a ~ 2 cm Po = 11 MW PHIN gun needs about 10 MW for 85 MV/m Roughly 30 MW needed to power the injector (one klystron)

  15. Beam instrumentation • Laser diagnostics: laser power, position, virtual cathode, micro pulse length • RF diagnostics: rf power signals, rf phase Define rough commissioning scenario, what do we measure where and how

  16. Klystron Issues • Transport: Study of transport and possibility to exchange klystron in situ has to be done, likely a local lifting device is needed • Synchronisation: 3 GHz synchronized signal is needed as well as a number of timing triggers • Safety: The modulator contains Oil together with high voltage, the waveguide may contain SF6A risk assessment has to be done to determine fire protection measures !! • Remote control: We usually have access to those klystron while running beam, likely need to improve the remote control capabilities

  17. Questions A few question to trigger discussions: Timing: How is it organised, beam, controls, data acquisition Controls: Guidelines for the control system, hardware, FESA, data base Experiment data taking: which information we need synchronized, sampling rate (BPM’s protons, electrons, Laser, spectrometer )? Location of electronics for power supplies, diagnostics and data acquisition

  18. Rough time line Infrastructure and issues before installation: Water, power, Ethernet, klystron handling equipment, racks for electronics, electron source shielding, access system, laser beam line, alignment concept, commissioning concept, controls

  19. Conclusions • New CERN work package for the electron source in place • Many open questions we have to address in the future • Beam requirements for first phase likely possible with PHIN gun and booster • Some useful equipment should be available from CTF3 • Need detailed beam and laser specifications • Requirements for second phase challenging to fulfil simultaneously • A lot of work ahead, help is very welcome

  20. End

  21. Awake electron beam work package reflections • Questions: • Access scenario, where can we go during experiment • Location of power supplies, electronics, data acquisition, vacuum equipment • Location of klystron/modulator elements • Transport of klystron/modulator items, crane for mounting klystron ? • Safety requirements, restrictions • Electron source housing, how does it look like • Beam diagnostics, what has been done for the beam line yet, BPMs, correctors • Control system, beam, vacuum • Water, electricity availability • Clarify collaborations, with UK, Frascati ? • Define time constraints, milestones

  22. Single plasma cell @side injection

  23. 2 plasma cells/on-axis injection

  24. Awake simulations Phin gun, 20 MV/m structure, 0.01 nC, 0.5 mm laser

More Related