Tuesday Nov 16th Fill 1492 into physics around 07.30

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Nominal intensity bunches ● First ramp with nominal intensity bunches suffered from an instability appearing around 1.8 TeV. ● Nominal intensity bunches.
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Presentation transcript:

Tuesday Nov 16th Fill 1492 into physics around 07.30 500ns_121b_113_114_0_4bpi31inj_IONS Initial luminosity 2.5 1025 cm-2 s-1 Lost at 08.45 - network instability triggered the FMCM for the D1 in P5 Refill for physics Same configuration Fill 1493 450 Z GeV emittances B1-H: 2.6 B1-V: 2.1 B2-H: 3.5 B2-V: 3.3 Beam intensities ~ equal Stable beams from 12.50 8:30 meeting

The step up in BCT IS NOT REAL This is the result of an automatic switch of the BCT. The switching threshold to low gain channel for low BW BCT has now been set to 1.5e10 charges (instead of previous 1.2e10). This problem should not appear again. 8:30 meeting

Emittances as seen by BSRT 8:30 meeting

Intensity and beam size evolution 8:30 meeting

Comparison attempt BGI, BSRT, WS WS only at inj (quite a large spread in the meas emittance) BSRt only at 3.5 TeV, Saw-tooth because scanning on different bunches BGI logged values multiplied by 2 8:30 meeting

Tuesday Nov 16th Fill 1493 dumped just after 22.00 Refill for physics Same configuration Fill 1494 450GeV emittances B1H 3.7 B1V 5.3 B2H 4.1 B2V 9.3 Decided to ramp anyway Stable beams from 02.30 MKI problem IR2 8:30 meeting

Proton MD program Wednesday 17 05 01 Dump and recover 06 03 Access 09 04 Interlock checks 13 07 Injection and damper checks for 75ns 20 10 Injection of trains of 24 or 48 bunches Thursday 18 12 Qualification of e-cloud build up with 75ns 18 4 Switch to 50ns, injection and damper checks 22 Stability measurements, 50ns and 75ns beams Friday 19 Test ramp with pilots 08 Ramp 9x12 50ns bunches 17 21 Back to ion physics Total MD time 64 8:30 meeting