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Injection Test Meeting Tuesday 26th August Controls Issues/Results Injection Kickers

Injection Test Meeting Tuesday 26th August Controls Issues/Results Injection Kickers. Etienne CARLIER AB/BT. Injected BCT BCT signal now OK (~15mv for 2E+09) Still common mode noise between BI and BT racks during kicker MAIN switches turn-on

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Injection Test Meeting Tuesday 26th August Controls Issues/Results Injection Kickers

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  1. Injection Test Meeting Tuesday 26th August Controls Issues/ResultsInjection Kickers Etienne CARLIER AB/BT

  2. Injected BCT • BCT signal now OK (~15mv for 2E+09) • Still common mode noise between BI and BT racks during kicker MAIN switches turn-on • Try to reject noise with passive filter and/or better ground separation between BI and BT • Softstart • Some initial conditions not yet taken into account when ONSTANDBYSOFTSTART is performed (primary capacitor bank voltage to high w.r.t. requested start secondary voltage) • ConditioningIsValid timer is restarted when RCPS is pulsed and not only when we have current in the magnet… ConditioningIsValid is restarted if the injection prepulse is missing • Injection kick (i.e. current in magnet) UTC timestamp • Information available in MKI CTRVs when current in MKIMA.D5R8 or MKIMA.D5L2 is detected. Not clearly visible in application GUI and in logging database • Add “xpocData” property within LhcMKIkick class with last valid injection kick data (UTC timestamp, settings, measures…)

  3. RBAC • Unexpected (…unwanted) implementation of some RBAC features after a reboot of MKI FECs (i.e. no code modification) • Full implementation under progress (FESA2.9/RDA2.4) • Roles and Rules still to be created and tested • Logging • MKIMA vacuum data logged into measurement and logging databases • Data reduction still to be optimized • MKI GUI • Some “space” for improvements • Timing enable/disable control • SOFTSTART duration monitoring • Injection Permit • Seems OK • BIS windows set to OK simultaneously for both injection kickers during interleaved injection operation • Monitoring in OASIS is OK

  4. Timing • Slow and Fast timing distribution (i.e. kicker pulsing) even with NO INJECTION REQUEST from the Sequencer • Inject and Dump • Adjusted for BEAM2… it should be possible to dump the beam after ¼ turn. Still to be done for BEAM1 • Frev / Prepulse synchronisation should not be changed (i.e. prepulse should be received before Frev at pt6) otherwise it will not work anymore • OASIS signals deployed for LBDS (B1/B2) • Lost of synchronisation for BEAM1 injection (-4us) • Should not be linked to adjustment of “Inject and Dump” for BEAM2 • Reason(s) not yet understood • Fine synchronization of kicker magnet current • Still to be done • Kick / Beam synchronization policy still to be defined • BT kick delay Vs RF Bucket Selector

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