[Olympus] SlowControl
frullani@iss.infn.it
frullani at iss.infn.it
Fri Apr 23 07:18:57 EDT 2010
Hi Anton,
sorry for the delay. Regarding the slow control for the electronics for
GEM and MWPC chambers that we will provide we need to control, as we did
for HERMES, the voltage and current of each low voltage power supply
module
(I will specify the number of channels when more information I will
receive from Alexander Kisselev for MWPC and in some months from now when
we will have decided how many low voltage power supply modules to use for
FEC of GEM readout), moreover for each GEM FEC we need to control the
temperature level that is supplied with the VME data stream, If the pitch
of the 10x10 cm2 GEM will be of 400um, we need 24 FEC for the 6 GEM and
then 24 channels for the temperature slow control.
I think that for the moment is all that you need.
All the best.
Salvatore
> Hi,
>
> sory for week of silence. I had to stomach:) your mail,
>
>> Hi,
>>
>> I think it is difficult to specify exactly what needs to be readout and
>>stored via slow control now. It change with time and as we develop the
>>experiment but I will give a list below.
>
> BTW. I suppose not latest version of TDR is on page. Could you please put
> the latest one.
>
>>
>> The important items to agree on now are:
>>
>>1. Slow control data must be in the data acquisition. Maybe it
>>doesn't all have to be stored though it may as well be. Maybe it can be
>>compressed to remove quantities which haven't changed since previous
>>record. Frequency should be agreed upon (once every 10 seconds perhaps).
>
> I thought we agreed on this in December on meeting.
>
>>
>> 2. Slow control data should also be stored separately. There should be
>>tools for analysing the SC data.
>
> Sure.
>
>>
>> 3. Since I don't think Anton will be responsible for hardware (i.e.
>>temperature sensors, etc.) each group must say how the data will be
>>provided to Anton. For example the wire chamber gas system pressures,
>>temperatures, flows, valve settings, etc. will be available through
>>EPICS. I assume that Anton will then interface the various systems with
>>his system (perhaps based on what is below he might choose EPICS).
>
> Saying EPICS you mean this part is already done, or to be done? Sensors
> flowmeters... Finaly, EPICS soft with configured db running?
>
>>
>>4. Reading and storing the data is one thing. Control is another. Will
>>slow control have an interface for controlling things like the high
>>voltage, low voltage, wire chamber gas system, target gas system, etc. or
>>is this responsibility elsewhere.
>
> Controlng things is part of SC for sure. But to control so delicate
> parameters like gas, etc is responsibility of corresponding group. They
> now their hardware.
>>From my side interface software can be done. For that I need:
> 1. user library from Christian to be able to access the electronics
> (unless it is not already done via EPICS),
> 2.Manuals and callibrations.
>
>>
>> 5. Slow control must interface with the data acquisition and the
>>operators. High voltage trips must inhibit data acquisition immediately.
>>Alarms and warnings must also be presented to the operators for action.
>
> Ups. To inhibit DAQ is responsibility of DAQ. If every SC or
> other stupid soft is able to stop DAQ we will loose completely.
>
> Alarms and warnings are other things. This is SC responsibility.
> Probbably, marking event or run BAD as well. Not evens as thy are but
> writting a kind of automatical logbook. Kind of table like this:
>
> UnixTime RunNumber Status
>
> Where status is say OK, trip, gas problems, cooling, magnet off, etc
>
>>
>> 6. The will be numerous scalers and other rates or settings such as
>>pre-scale factors, trigger rates, etc. which must be in the data
>>acquisition chain. Possibly some of these can also be recorded
>>periodically to SC.
>
> Sure.
>
>>
>> 7. Slow control must interface with the DORIS operation. We must say
>>when the detectors are in a safe state. DORIS must tell us when we can
>>switch on. Similarly the vacuum system in OLYMPUS must exchange
>>information with the DORIS vacuum system to control valves to ring.
>
> Sure. So was done in NERMES. We took their data via nextmex. And we
> prowided them with our info on vacuum, magnet status. Every of 3 HERA
> experiments exported their pictures on magnet and vacuum statuses to HERA
> control room as well.
>
>>
>> 8. Slow control should not be responsible for data quality. The data
>>acquisition system should provide a mechanism for sampling the data and
>>the various groups should form histograms which the operators can check
>>to ensure the detector is working properly.
>
> Should not be responsoble. But used for data quality. Right?
>
>
> Thank you for info below.
> I'm trying to make summary table of SC channels (values) number for
> comming meeting.
>
> Anton
>
>>
>> I am sure there are things I have forgotten but maybe this will serve as
>> a starting point for discussions at the meeting.
>>
>> Now for a list of things for slow control:
>>
>> Target gas system: - interface EPICS
>> - 15 valves
>> - 6 pressures
>> - 4 temperatures
>> - 2 mass flow controllers
>> - 2 pumps
>>
>> Wire chamber gas system: - interface EPICS
>> - 4 valves
>> - 12 pressures
>> - 8 temperatures
>> - 2 mass flow controllers
>>
>> Gem Tracker gas system: - interface EPICS
>> - probably uses the same system as wire chamber
>> - possibly some extra valves
>>
>> Lumi Monitor gas system: - interface EPICS
>> - probably uses the same system as wire chamber
>> - possibly some extra valves
>>
>> MWPC gas system: - interface ?
>> - ?
>>
>> High voltage: - interface Lecroy main frames or EPICS
>> - voltage of each
>> - currents of each
>> - 198 for wire chamber
>> - 68 for time of flight
>> - 4 for Gem tracker
>> - 6 for luminosity monitor
>> - 18 for symmetric Moller detector
>> - MWPC ?
>>
>> Low voltage: - interface EPICS
>> - voltage
>> - current
>> - 66 for wire chamber
>> - 4 for Gem tracker
>> - 6 for luminosity monitor
>>
>> Vacuum system: - interface EPICS
>> - 8 pressures
>> - 8 valves
>> - 6 pumps
>>
>> Magnet: - interface main power supply and EPICS
>> - main power supply voltage and current
>> - 12 water flow meters
>> - 12 temperatures
>> - 8 Hall probes
>> - 8 trim coil voltages and currents
>>
>> DORIS: (from Frank's message) - NextMex ?
>> - 11 currents
>> - lifetime
>> - 16 positions
>> - 6 scrapper positions
>> - 8 corrector currents
>> - 1 cavity voltage
>>
>>
>> Cheers,
>> Douglas
>>
>> 26-415 M.I.T. Tel: +1 (617) 258-7199
>> 77 Massachusetts Avenue Fax: +1 (617) 258-5440
>> Cambridge, MA 02139, USA E-mail: hasell at mit.edu
>>
>>
>>
>> On Apr 13, 2010, at 11:43 AM, Anton Izotov wrote:
>>
>> > Dear friends,
>> >
>> > looks it's time to collect some info for future. Not far future, BTW.
>> > We all need a SlowControl (SC) data. And we want it as ... as
>> possible.
>> > Taking into account that our project seems to pretend to be very
>> precise
>> > one we are much dependent on SC data. It is reality.
>> >
>> > I would like to know your oppinion. What would you like to store
>> > (see on your monitors, monitor, control) about your own beloved
>> detector?
>> > I mean ADC channels number needed as well.
>> >
>> > Responsibles! I'm calling to you.
>> >
>> > The sooner you answer the sooner it works.
>> >
>> > My best...
>> >
>> > Anton
>> > _______________________________________________
>> > Olympus mailing list
>> > Olympus at mit.edu
>> > http://mailman.mit.edu/mailman/listinfo/olympus
>>
>>
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