SPS Injection |
Whenever the MKP kicker is not pulsing, then the MDSH.119 must be pulsing to correctly dump the injected beam on the TBSJ (injection dump). The link to the MDSH is through the MKP interlock system. | |||||
Document on LHC settings for injection. | |||||
The kicker settings :
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The settings for the MDSH are :
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Dumped beam positions : on the screen (1199) the beam should be in the center with the MDSH on, i.e. when the kicker is on STANDBY or OFF (power - not timing !). Note that the screen is inverted, the ring is on the right ! |
Beam/Energy | Position on screen MDSH OFF |
Position on screen MDSH ON |
Position on TBSJ MDSH ON |
FT/14 GeV | -81.7 mm |
-99.4 mm |
-105.5 mm |
LHC/26 GeV | -60.5 mm |
-97.8 mm |
-105.5 mm |
MKP timing: for LHC beams (26 GeV) it is important to position the beam close to the rising edge since not all of the TMRs have the same length (some have only 4 microsecs). |
Normal FT injection
MKP OFF - MDSH OFF
MKP OFF - MDSH ON
Screen references (May 2008)
BTV1186: beam position for LHC beams (26 GeV) . |
BTV1197: beam position for LHC beams (26 GeV) . First screen with injection kicker on, second with kicker on standby (MDSH on), third with the kicker on 'timing off' (MDSH off). |
BTV1199: beam position for LHC beams (26 GeV) with kicker on standby (MDSH on). When the kicker is 'timing off' (MDSH off), the beam spot is not visible. |