BLM Status and Plans J Lewis 7 28 06 BLM

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BLM Status and Plans J. Lewis 7/28/06 BLM Status and Plans

System Status • All hardware received and tested • Four crates installed in MI – MI 30, MI 40 connected to inputs – MI 10, MI 60 N running all cards, but no inputs – Resolving minor system integration issues – Basic software OK • Fast time plots • Flashes, profiles, etc. (I 39) – Reliable • No crashes since initial debugging • MI 60 N preproduction crate ran for months 7/28/06 BLM Status and Plans 2

MI Issues • Noise – Significantly more common-mode noise that we saw in test locations last year – Chokes in filter boxes not sufficient – Can mitigate with long time-constant mode (~0. 5 ms) • Still there – Waiting to get into tunnel • Pedestal drift – Side-effect of noise • Sampling coherent effects – New software will take pedestal with internal input switch open – Backup plan: store pedestals in DB 7/28/06 BLM Status and Plans 3

Tevatron Status • All crates and CPUs installed last year – On network • E 1 crate populated – Inputs from duplicate ion tubes at E 11 -E 16 – Some readout issues to resolve • Different front-end CPU from MI • Just started – Can test most features for Tevatron parasitically • Expect software is OK – Dean did both I 39 and T 39 7/28/06 BLM Status and Plans 4

Installation Plan • One day per sector to install • Start with E once Zero buildings last • Light work: cards and filter boxes – Minimal risk if beam in machine – No connection to other systems – Connect clocks only between stores • After each install check for noise – Connect one channel at a time to new system for ~30 sec. 7/28/06 BLM Status and Plans 5

Change to New System • After all crates operating and E 1 checkout complete • 10 -minute job to move cables to new system • Start with one house • If OK, perhaps one sector every 2 days • Criterion for change? – My proposal: All crates running and E 1 shown to work for diagnostic functions (i. e. no aborts required) 7/28/06 BLM Status and Plans 6

System Configuration • Crate properties – Digitizer parameters – Sliding sum lengths – Now hard coded • Abort functions – One threshold per channel per machine state – Masks and multiplicity cuts by state • Lots of DB and software work – Not much progress yet 7/28/06 BLM Status and Plans 7

Device Names • Three sliding sums – Fast (2 ms): LQxxx – Slow (30 ms): LSxxx – Very Slow (1 s): LVxxx • Example: LME 11 maps to LQE 11, etc. – Once operational can alias LQ device to LM device • A few funny ones in zero buildings – I send around a list. Silence is consent • High voltage, e. g. LHVE 1 • Also crate voltages, etc. 7/28/06 BLM Status and Plans 8

Misc. • Nice features – Can update firmware on digitizer and control card via VME – Also decode MI state, so will be able to blank F sector aborts at flat-top if required – Serial link for ring-wide abort criteria • Have simplementation • More input would be helpful • Question: – What TVBS and/or TCLK events to trigger turn -by-turn buffers? 7/28/06 BLM Status and Plans 9

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