Re: 13JAN99 GC test complete

Kate Scholberg (schol@budoe.bu.edu)
Wed, 13 Jan 1999 15:52:55 -0500

> The advertized GC calibration for today is now complete. GC-like LED events
> were generated in SM1/2, SM3/4, SM5/6 and finally on all 6 SMs. The LED
> parameters (pulse height and widths) were kept the same in all tests. Below
> you may find the log for each combination of SMs. Bursts limited within 2 SMs
> had a total of 100+50 hits generated over 2+10 seconds. The burst over the
> entire detector had 300+150 hits generated over 2+10 seconds.
> At least 10 minutes of "silence" interval between SM configuration changes
> was introduced. All times reported in the logs below are VSMAC3 times
> which are 8min20sec behind respect to VXMACB clock.
>
> On MACRO's main acquisition console GC alarms were received from PHRASE
> only from SM1/2 and SM5/6.
>
> At this point it will be useful to have some input from the GC working
> group on what was detected from each of the systems on the above bursts
> and understand if further tuning of the software is needed.
>
> The relevant question now is how frequently we want to perform this
> calibration. Given that the calibration events are pre-announced
> and well separated, online monitors may be designed to flag such
> bursts as calibration but still forward the alarm to the international
> watch. Having this test once a month -- say the first maintenance day
> of each month -- I feel will be a good starting point.
>

To first order, it looks as if things worked (all the way through to
the international machine-- in fact the first actual ERP-PHRASE
coincidences!), but I haven't had a chance yet to go through all ERP
output in detail. I'll post a report as soon as I can.

Thanks, Erik (and Yanni et al) -- this should be extremely useful.

A presto,

Kate.