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R. Corsini
CTF3 highlights since last Project Meeting - Operation
• Further consolidated factor 4 combination & transport to TBTS.
• Carried out Break-down kicks and BD statistic studies in TBTS. Lots of data collected, being analyzed. Established higher rep rate operation (2.5 Hz for now).
• Re-commissioned TBL with 13 PETS, full transmission with factor 4, first tests with factor 8.
• Re-commissioned and improved factor 8 combination (new DL alignment and flexibility for closed RF bump in CR helped a lot).
• Worked on beam performance (stability, emittance and bunch length). Established new chicane optics (R56 = 0.2 m and R56 = 0 m).
• Improvements in instrumentation, optics modeling, operational software & procedures…
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R. Corsini
Further consolidated factor 4 combination & transport to TBTS
Factor 4 beam to TBTS
Current before night switch-off
Current at start-up in the morning (~ 10 min set-up)
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R. Corsini
Power & Acceleration in TBTSTypical (high) power levels, factor 4, recirculation
Two Beam acceleration – 145 MV/m (31 MeV gain - about 105 MW input)
W. Farabolini, J. BarrancoA. Dobrowski
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R. Corsini
BD studies in TBTS One of the first nights of TBTS operation
BDR ≈7 10-4
W. Farabolini
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R. Corsini
BD studies in TBTS
High-Power TBTS operation
BDR ≈5 10-2
Later TBTS operation
Higher rep rate, much more stable beamW. Farabolini
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R. Corsini
Higher rep rate operation
Radiation monitors
5 Hz, factor 4
BPM, TL2
F. Tecker, G. Dumont
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R. Corsini
Break-down kicks measurements
A. Palaia, R. Ruber, W. Farabolini
First BD kick in 2012
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R. Corsini
A. Palaia, W. Farabolini
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R. Corsini
A. Palaia, W. Farabolini
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R. Corsini
Re-commissioned and improved factor 8 combination
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R. Corsini
TBL with 13 PETS, transmission with factor 4 & 8
S. Doebert, R. Lillenstol
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R. Corsini
TBL with 13 PETS, first tests with factor 8.
W. Farabolini
R. Lillenstol
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R. Corsini
TBL with 13 PETS, first tests with factor 8.
R. Lillenstol
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R. Corsini
Energy/Charge stability
RF pulse power flattening feedback
No feedback – Power MKS 06 vs. Hor. Position (momentum)
With feedback – Power MKS 06 vs. Hor. Position (momentum)
With feedback Charge vs. Hor. Position (momentum)
Energy oscillation (temperature)
T. Persson, P. Skowronski
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R. Corsini
Chicane settings for low R56
0.1- 0.05- 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.510
12
14
16
18
20
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24
26
28
3030
10
FWHMk
Msk
Mk
0.50.1- R56_Fk
Bunch length measurements
P. Skowronski, J. Barranco
A. Goldblatt
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R. Corsini
Current Measurement Calibration
CR BPMs
B. Constance
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R. Corsini
B. Constance
Current Measurement Calibration
CR BPMs & BPIs
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R. Corsini
CTF3 highlights since last Project Meeting - Installation
• New TBTS tank with two accelerating structures installed ready to run from next week.
• Drive Beam phase monitor being installed at the end of the linac for test.
• Modified temperature stabilization system for RF pulse compression.
• Sent dying TWT to repair. Should have it back in time for end of the run. 1st one shows some sign of aging…
• Defining scenario for shutdown and running during LS1
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R. Corsini
Modifications of the cooling station
A. Dubrowskyi, F. Tecker
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R. Corsini
Sketch Program
• Factor 8 combination – TBL deceleration high current
• Commissioning TBTS new tank
• Commissioning DB phase monitors
• Beam quality improvements (emittance – bunch length)
• Run as planned until last week in December
• Short Christmas stop (First 2 working weeks in January)
• Run until May (June)
• Summer shut down – Modulator/Klystrons maintenance
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R. Corsini
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R. Corsini
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R. Corsini
Vertical HorizontalFactor 4
2011
Factor 4
Factor 8
Emittance
2012
2012
2011