Recent progress on Choke-mode damped accelerating structures for CLIC main linac

Jiaru ShiDepartment of Engineering Physics, Tsinghua University2013.01.31

CLIC Workshop 2013Accelerator Activities at Tsinghua University

Brief IntroductionTsinghua University, Beijing~7000 Faculties and Staffs~35000 Students, ~14000 UndergraduateAccelerator labIn Department of Engineering Physics16 faculties (4 full Professors) and more employeeAbout 20 graduate students

ActivitiesEducation (undergraduate and graduate)Low Energy Electron Linacs and Their ApplicationsRF structure Research and DevelopmentCompact X-ray Light Source (TTX)Compact Pulse Neutron Sources (CPHS)

Machining Workshophigh-precision machine tools and CNC MachineComputer Numerical Control machine4

Facility for brazing and bakingHigh-T hydrogen furnace

Medium-T hydrogen furnace

Baking oven

Annealing furnace Vacuum furnace

Laser welding machine

Tool microscope

Leak detector November Collaboration Meeting, CERN

Microwave measurement for RF structureTwo based on SNA, two based on VNAS-band Linacs for X-ray Imaging

1.5 MeV SW Linac2 MeV SW Linac4 MeV SW Linac6 MeV SW Linac9 MeV SW Linac15 MeV SW LinacX Band Accelerating Structure

X BandS Band

X-band 6MeV Accelerating tubeX-band 2.5MeV Accelerating tube8Medical Applications

Cargo Inspection System

Photocathode RF gun

The 1st Gun ,For THU2006The 2nd Gun,For SSRF 2006The 3rd Gun,For BNL2007The 4th Gun,For NSRL2008The 5th Gun,For THU2008The 6th Gun,For THU2010

The THU Gun,2011

Thsomson scattering X-ray source TTX(Tsinghua Thomson X-ray source)Free electron laser SDUV-FEL(Shanghai Deep-ultraviolet FEL) SXFEL(Shanghai soft X-ray FEL test facility)MeV Ultrafast electron diffraction Tsinghua BNLNovember Collaboration Meeting, CERN

RF Structure R&D

Choke-mode structureCollaboration start from 2009

Wakefield damping

High gradient structure productionMachining, bonding Full structure will be produced

CLIC T24 Prototype disc High gradient structure studyStructure design and productionHigh power test @X-band Magnetron based power source 1.5MW peak power, ~s pulse lengthKlystron based power source planned, ~10MW level.Breakdown studyPhotoemission experiment

TTX: lasers, electrons & x-raysCPHS-neutrons: Long-Pulse SANS, Imaging, CPHS-neutrons: Short-Pulse options: Diffraction, QENS, CPHS-proton accelerator R&DCPHS-proton applicationsCPHS Complex approved boundaryElectron beam line

Laser System

800nm, ~20TW, ~30fs266nm, 1mJ, 30fs~10psRF GunTS IP

30 mm Ti windowX-ray profile measured by CsI screen and EMCCD

Thomson Scattering Experiment

CPHS project13MeV/50mA, 0.5ms/50HzNeutron targetNeutron instrumentCompact Pulse Hadron Source (CPHS)

RFQ

DT

SummaryAccelerator R&DLinac tubesDesign and build accelerating structures on siteHigh-gradient structure Major projectsThomson Scattering X-ray SourceCompact Pulse Hadron Source Please contact us for details if interested

Thank you for your attention!Horizon-COscillator

Evolution-3020mJ@1kHz

SpectraPhysics Pro-350-101.4J,532nm@10Hz

SpectraPhysics Pro-350-101.4J,532nm@10Hz

SpectraPhysics Pro-350-101.4J,532nm@10Hz

25mJ@10Hz