RF observation from Saturday morning Observation of beam induced voltage/power following the two...
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RF observation from Saturday morning Observation of beam induced voltage/power following the two klystron trips: 03:18 3B1 just at end ramp, 1.26E14 p total, 1.19 ns, we observed 0.94 MV beam induced and 153 kW. Abort gap population not measurable. 07:15 2B1 after 4 hours physics, 1.19E14 total, 1.23 ns, we observed 0.8 MV induced and 118 kW. Abort gap population peaks at 5E9 Now extrapolating to 1236b, 1.2E11 per bunch, we will get ~ 212 kW (using 3B1 data) and 183 kW (using 2B1 data) beam induced power. MAXIMUM until we condition the couplers further. LHC status 12/6/2011 Philippe Baudrenghien
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Transcript of RF observation from Saturday morning Observation of beam induced voltage/power following the two...
LHC status
RF observation from Saturday morning
Observation of beam induced voltage/power following the two klystron trips:
03:18 3B1 just at end ramp, 1.26E14 p total, 1.19 ns, we observed 0.94 MV beam induced and 153 kW. Abort gap population not measurable.
07:15 2B1 after 4 hours physics, 1.19E14 total, 1.23 ns, we observed 0.8 MV induced and 118 kW. Abort gap population peaks at 5E9
Now extrapolating to 1236b, 1.2E11 per bunch, we will get ~ 212 kW (using 3B1 data) and 183 kW (using 2B1 data) beam induced power. MAXIMUM until we condition the couplers further.
12/6/2011Philippe Baudrenghien
LHC status
Recent intensities
12/6/2011
1790 1800 1810 1820 1830 1840 1850 1860 18701.00E+11
1.05E+11
1.10E+11
1.15E+11
1.20E+11
1.25E+11
1.30E+11
1.35E+11
Average bunch intensity
Fill number
1790 1800 1810 1820 1830 1840 1850 1860 18700.00E+00
2.00E+13
4.00E+13
6.00E+13
8.00E+13
1.00E+14
1.20E+14
1.40E+14
1.60E+14
Average beam intensity
Fill number
LHC status
Saturday 11th June - morning
03:40 Stable beams fill #1863. Initial lumi 1.1e33
13:17 Beam dumped due to cryo conditions MSL1, controls problem on valves regulation L1 (possible single event -
cryo PLC.) Integrated luminosity 30 pb-1
In the meantime at 8:30 vacuum valves in the PS in, leak on fast wire scanner leak detection, replacement of wire scanner mechanism, pump
down pump down a lot faster than originally foreseen, beam back in
PS around 21:00
12/6/2011
LHC status
PS vacuum
12/6/2011
LHC status
PS wire scanner
12/6/2011
Spot the wire
LHC status
In the shadow
UPS ESS22/85 RF conditioning
17:15 RB81 – thyristor bridge cooling problem again discharge request on main circuit (PC Field: TRG|BRIDGE A
COOLING) Access for EPC and CV Problem fixed definitely – to be checked
12/6/2011
LHC status
Sunday 12th June
Beam back in LHC ~23:30 (delay because of recovery from RB.A81 intervention)
00:29 Stable beams #1864 (23 pb-1)
07:17 beam dumped by trip of RD2.L1 Vacuum valves in Looks like a bus-bar quench Cooling problem on the link some time before
Incoming: physics 1092 x 1092 bunches, trains 144 bunches
12/6/2011
