CTF3-CLEX meeting June 12, 2006page 1 choice of architecture : 1 photo-injector 3 LIL sections: 1 for compression and 2 for acceleration 1 beamline with diagnostics (leading to 2-beam teststand) Probe beam status and schedule January MV/m compression 17 MV/m acceleration 17 MV/m acceleration LIL sections beam dump focusing coils K quadrupoles Laser RF pulse compression 2 x 45 MW profile monitor position monitor steerer rf gun cavityspect. magnetRF deflector C A L I F E S

CTF3-CLEX meeting June 12, 2006page 2 RF gun status R. Roux July, 7 th Drawings, overview 2.What is under way? 3.Open questions, ask for info 4.Problems, risks

CTF3-CLEX meeting June 12, 2006page 3 1.Studies finished 2.Drawings finished 3.List of components: - gun with a measurement loop - 2 tapered waveguides - 2 LIL flanges - 2 solenoids - 1 steerer - vacuum chamber (tubes, valve, bellow) - 2 gauges - 1 ionic pump - 1 pneumatic valve - 1 translation trolley for the preparation chamber (additional request from CERN) - NEG coating on the vacuum chamber (agreed with CERN people) 1. Overview solenoids RF input steerer valve photocathode vacuum pump

CTF3-CLEX meeting June 12, 2006page 4 2. What’s under way? Gun: new supplier, the coupler cell should arrive between 17th-21th July if everything OK, order the rest of the gun, all pieces in September then, RF measurements, mechanical adjustments and brazing at LAL (thanks to Eric Chevallay for the 316LN stainless steel, we will soon refunded) Magnetism: coils and steerer are ordered, should arrive in the beginning of September power supplies will be bought by CERN (offer of R. Losito) Vacuum: gauges and valve are received, ionic pump at the end of July power supply will be bought by CERN (offer of R. Losito) Mechanics: vacuum chamber and supports are under construction in LAL workshop it should be finished in September but risks of overlap with PHIN gun machining  PHIN gun has the priority !

CTF3-CLEX meeting June 12, 2006page 5 3. Open questions, ask for info Girder: if we can reuse the LIL 2300 mm girder, we need the drawings open question: RF gun assembly on girder at LAL or at CERN ? Cabling: Who does the cabling between the photo-injector and the racks? -cables for solenoids and steerer (electric and cooling) -cable for RF loop -cables for gauges and power supply -on which side of the linac set the connectors of the solenoids? Possible overlap between the solenoid connectors and RF network pumps? (happened on PHIN, solenoids sent back to the supplier to modify connectors) Cooling: tuning cooling loop from frozen water (20°C) the gun will be mechanically deformed in such a way that the right tuning frequency achieved at  30°C

CTF3-CLEX meeting June 12, 2006page 6 3. Problems, risks - New supplier for the gun, if not good  delay - Money: 70 k€ received this year not enough to order the power supplies and gun cooling loop I hope to get the totality of the required budget next year in March But up to now, RF gun construction proceeds well

CTF3-CLEX meeting June 12, 2006page 7 Signal taken from the Drive Beam Laser 2 main distinct tasks: 1.extraction & manipulation of laser beam (windowing, x4 frequency multiplication, doubling of the pulse frequency 1.5  3 GHz) 2.transport of the laser beam over 80 m as far as the photo-cathode Subcontractor : LILM (Laser Matter Interaction Lab) from CEA-Saclay Study of the 2 tasks till the end of 2006 mechanical design and realization follow-up by Dapnia Pb : delay of the DB laser  1st tests with real laser will be very late Laser system

CTF3-CLEX meeting June 12, 2006page 8 Time-schedule

CTF3-CLEX meeting June 12, 2006page 9 Beam dynamics calculations nearly complete... single bunch is fine multibunch operation due to beam-loading, bunch charge should be linearly reduced to meet energy & phase requirements (1% and 1deg) Qb < 5nC/N still to be done: effect of laser spot misalignment estimation of the emittance measurement accuracy

CTF3-CLEX meeting June 12, 2006page 10 Time-schedule

CTF3-CLEX meeting June 12, 2006page 11 Califes Drawings Drawings nearly complete...

CTF3-CLEX meeting June 12, 2006page 12 injector (LAL Orsay) Injection beamline laser beam laser table LIL section input BPM screen vacuum pump

CTF3-CLEX meeting June 12, 2006page 13 inter-section BPM steerer

CTF3-CLEX meeting June 12, 2006page 14 diagnostics beamline screen RF deflectorQL3 TripletDipoleDumpvac. pump total length (cathode plane to output valve) = m

CTF3-CLEX meeting June 12, 2006page 15 RF system klystron, RF pulse compression, RF network : supplied by CERN Modulator : includes a high voltage pulsed power supply with negative polarity three electromagnet power supplies a filament heater power supply an ion pump power supply a hydraulic network a X-ray shielding a control-command system some racks containing the materiel offers from vendors received on 1st of July realization time months vendor choice at end of July

CTF3-CLEX meeting June 12, 2006page 16 RF network defined in March power phase-shifter has to be developed (fine tuning of the compression section)

CTF3-CLEX meeting June 12, 2006page 17 Phase-shifter 3 GHz scaling from a SLAC model at 11.4 GHz by Alexej Grudiev sliding circular guide + mode converter tolerances and mechanical study made at Saclay fabrication will start end of september power tests at CERN

CTF3-CLEX meeting June 12, 2006page 18 Time-schedule

CTF3-CLEX meeting June 12, 2006page 19 Vacuum adaptation and laser miror Compression LIL section Accelerating LIL section Diagnostic line RF Gun Sector 1 Sector 2 Sector 3 IZ 120 IZ 270 Vacuum Vacuum system defined 2 LIL sections tested under vacuum at Cern 3 valves 6 ion pumps for LIL sections 2 ion pumps for input and output beamlines power supplies, gauges hardware provided by CERN primary pumping group

CTF3-CLEX meeting June 12, 2006page 20 steerer H+Vsolenoidsearth field correction quadrupolesdipole 52 x 173 x 231 order before August CERN provision call for tender (5) before August CERN provision delivery Nov delivery May Magnets QL3 BHZ36

CTF3-CLEX meeting June 12, 2006page 21 # of power supplies typeIntensity (A)Voltage (V) Steerers12Bipolar± 10± 5 Solenoids2Unipolar12020 Quadrupoles3Unipolar20010 Dipole1 Unipolar with degauss capability Earth field compensation 2Unipolar53 Power supplies requirements Specifications of Power supplies have been done and conveyed to CERN

CTF3-CLEX meeting June 12, 2006page 22 Time-schedule

CTF3-CLEX meeting June 12, 2006page 23 MeasureRequirementschosen solutions CurrentResolution ≤ 1% Precision ≤ 3% Bandwidth > 250 MHz Single shot, non destructive BPM (after calibration) PositionResolution ≤ 20µm Precision ±100µm Bandwidth >50 MHz Range ±10 mm Single shot, non destructive BPM Screen + CCD camera ProfileResolution ≤ 20µmRange 10x10mmScreen + CCD camera EmittanceError < 20%Quad scan + Screen + CCD camera Central energy Resolution DP/P ≤1 % Precision ≤ 2% Bandwidth >250 MHz Single shot15° bending magnet + BPM Energy spread Resolution DP/P≤0.5% Time resolution is desirable 15° bending magnet + Screen + CCD camera; possible future... Streak Camera, segmented photomultiplier, segmented beam dump … for time resolution Bunchlength Resolution ≤0.5ps rms Variation of bunch length along the train Deflecting cavity + Screen + CCD camera; possible future... RF pick-up ( GHz) during operations Diagnostics

CTF3-CLEX meeting June 12, 2006page 24 BPM Specifications : single bunch & multi-bunch operation 3 GHz) 0.5 nC coaxial reentrant cavity, original design from R. Bossard (CERN) proposed and developed for TTF (M. Luong, C. Simon - DAPNIA) prototype for technology validation : OK pre-serie (2 units) : under fabrication

CTF3-CLEX meeting June 12, 2006page 25 Beam profile monitors 3 profiler systems to different locations: injector output, behind the triplet, behind the dipole 2 main sub-systems: 1.the vacuum tank with devices (screen, actuator, viewport, lighting) 2.the optics system (lenses, CCD camera, filter wheel, shielding…) Screen holder Insertion mecanism Tank study has started...

CTF3-CLEX meeting June 12, 2006page 26 TTF2CTF3 SOLEIL optics design (various magnifications) + CCD camera (with Cern MTV interface)  examples of optics design with different levels of integration Califes : will start next September Optics system

CTF3-CLEX meeting June 12, 2006page 27 Time-schedule

CTF3-CLEX meeting June 12, 2006page 28 Beam Graphite Lead Polyéthylène 500 Beam Dump Derived from SOLEIL (100 MeV, 0.5 to 8 nC, 3 Hz) Adaptation for CALIFES in progress (200 MeV, 1.5 A, 21 ns, 5 Hz)

CTF3-CLEX meeting June 12, 2006page m 22 m CLEX building CALIFES should fit into CLEX building... the last dipole could include 3 branches: straight to 2-beam teststand 15° to Beam Dump 30° to Instrumentation Test Beam

CTF3-CLEX meeting June 12, 2006page 30 Time-schedule

CTF3-CLEX meeting June 12, 2006page 31 Can we have a closed area for Califes ? Which girders can we re-use from CERN ? Who does the cabling between the Califes components and the racks ? Alignment: studied by Michel Fontaine from Dapnia who is the CERN contact person ? Questions List

CTF3-CLEX meeting June 12, 2006page 32 Cooling needs