Advanced Research Electron Accelerator Laboratory Linear Accelerator Layout
Advanced Research Electron Accelerator Laboratory Linear Accelerator Layout and Progress 6/5/2021 B. Grigoryan AREAL TAC meeting
Contents Linear Accelerator Layout Building and Infrastructure RF Gun Laser System RF System Cooling System Vacuum System Control System and Diagnostics Time Schedule 6/5/2021 B. Grigoryan AREAL TAC meeting 2
Linear Accelerator Layout Diagnostics + Experiments Gun Diagnostics + Experiments 3 -5 Me. V 12 Me. V Diagnostics + Experiments 20 Me. V max. 22 Me. V max. 45 Me. V Machine length up to beam dump ~9 m. Tunnel length 12 m with farther ~3 m extension possibility Bunch charge 200 p. C Peak current at cathode ~ 20 A Bunch transverse rms size ~ 800 um Normalized transverse emittance 6/5/2021 < 0. 5 mm-mrad FWHM bunch length 5 -10 ps Beam energy 20 Me. V Rms energy spread < 20 ke. V B. Grigoryan AREAL TAC meeting 3
Building & Infrastructure 6/5/2021 B. Grigoryan AREAL TAC meeting 4
Building & Infrastructure 6/5/2021 B. Grigoryan AREAL TAC meeting 5
Building & Infrastructure 6/5/2021 B. Grigoryan AREAL TAC meeting 6
Building & Infrastructure 6/5/2021 B. Grigoryan AREAL TAC meeting 7
RF Gun 1. 6 cell PSI type gun and solenoid scaled respectively Presented at IPAC’ 11. ”Beam phase space study for AREAL photogun linac”. TUPC 032 6/5/2021 B. Grigoryan AREAL TAC meeting 8
RF Gun 1. 5 cell REGAE gun with REGAE solenoid with larger aperture. 6/5/2021 B. Grigoryan AREAL TAC meeting 9
RF Gun 1. 5 cell REGAE gun with REGAE solenoid with larger aperture. Study parameters § Gun maximum gradient could be obtained with 7 MW klystron § Possible solutions of solenoid location to compensate space charge effect § Optimize beam parameters for emittance compensation scheme § Space for gun diagnostics § Start-to-end simulations. Goal: minimum emittance laminar flow, minimum energy spread. Studies are in progress 6/5/2021 B. Grigoryan AREAL TAC meeting 10
Laser System Laser setup study is in progress will be finished in July Parameter Laser wavelength (nm) Pulse Repetition Rate (Hz) Shot Repetition Rate (Hz) Beam diameter (mm) Beam Divergence (%) Pulse duration z (ps) Pulse profile transv. / long. Energy per pulse (µJ) Energy stability (long term) ( %) Pulse-to-pulse jitter (fs) Laser power * ( W) Single bunch 253 -266 1 1 ~5 0. 1% 5 -10 Gaussian / uniform (or Gaussian) 80 -100 ± 1 <100 <3 Market study and discussion for procurement of laser system are in progress 6/5/2021 B. Grigoryan AREAL TAC meeting 11
RF System Main RF frequency Pulse length Repetition Rate Peak power pulse Amplitude stability Phase stability Number of RF stations 2997. 9246 MHz 1 -2 us 1 Hz 7 MW < 0. 1 % 0. 1º 3 1 commercial LLRF will be used for gun 1 will be customized for 2 ACC sections 6/5/2021 B. Grigoryan AREAL TAC meeting 12
Cooling System Station 1 Station 2 Station 3 • Electron Gun • RF Station • Solenoids • Dump • Load • Accelerating section 1 • RF station • Quadrupoles • Loads • Accelerating Section 2 • RF station • Beam Dumps • Loads Test stand for Gun and RF station in progress. Will be ready by the end of July 6/5/2021 B. Grigoryan AREAL TAC meeting 13
Cooling System Calculations are finished. Proceeding with test stand procurement and assembly. 6/5/2021 B. Grigoryan AREAL TAC meeting 14
Vacuum System Nominal vacuum level Flange type standard Shutters Ion Pumps Number of individ. sections 6/5/2021 10 -9 CF 45 4 4 4 • Several components procured. Already at vacuum laboratory • Test stand assembly for vacuum system is in progress • Test and measurement devices required ! B. Grigoryan AREAL TAC meeting 15
Control System and Diagnostics EPICS platform Personnel Safety Machine Protection Easy diagnostics integration • Components procurement in progress • Development of local subsystems for test stands • Global control system development Fast, Reproducible, Reliable 6/5/2021 B. Grigoryan AREAL TAC meeting 16
Control System and Diagnostics Minimal Setup for Gun Diagnostics. 6/5/2021 B. Grigoryan AREAL TAC meeting 17
Control System and Diagnostics Minimal Setup for Gun Diagnostics. PSI type gun 6/5/2021 Calculations and setup in progress B. Grigoryan AREAL TAC meeting 18
Time Schedule. Phase 1 TAC Meeting Magnets & girders Control System Jan Febr March April May June July Aug Sept Oct Nov Dec Jan Febr March April May June July Aug Sept Oct Nov Dec Laser System RF Gun Diagnostics Vacuum System Cooling System RF System Build. & Infrastructure Installation Commissioning 6/5/2021 B. Grigoryan AREAL TAC meeting 19
Time Schedule. Progress 1. Magnet Fabrication 2. Girders and alignment technique and technology 3. Electron gun 4. Power supplies specifications 5. RF equipment 6. Procured equipment delays. 6/5/2021 1. Building and Infrastructure 2. Vacuum test stand 3. Cooling system test stand 4. RF laboratory 5. Laser system setup 6. Control system setup 7. Diagnostics 8. Beam physics studies 9. Staff wiliness and efforts 10. International collaborations. B. Grigoryan AREAL TAC meeting 20
Summary • The construction and infrastructure preparation in progress • Vacuum laboratory and test stand are established. • RF system laboratory established. Proceeding with modulators and klystrons • Laser system setup in progress. We will proceed with procurement process soon. • Control system and diagnostics proceeding in parallel with components setup. • We try to fabricate magnets and girders in Armenia. • We start commissioning next year !!! 6/5/2021 B. Grigoryan AREAL TAC meeting 21
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