Hi Adam and Adrian,
the LADS walls are now completely cabled with HV and were attached to the
HV crates in the Dtunnel.
Please find attached a table with the requested information of the
stby and oper voltages, the trip current, and ramping speed.
Doug and I have also set up shellscripts based on the previous wire
chamber hv scripts, named LADSHVL and LADSHVR (in pro2003/hv)
The voltages and the trip current need to be negative.
As the values are overwritten by the ring fill software after each refill,
and the "save" button in the Epics GUI is only god for one life cycle of
the IOC, I can't really set the LADS voltages and keep them up safely for
the rest of the weekend.
>From running the scripts we noticed that there is no trip at the standby
values, however at the oper values the crates did indicate tripoffs.
I the tripoffs at the oper values persist, I would recommend to condition
the LADS walls at standby values of 700 V each channel, until this is
further investigated.
I would appreciate very much if you Adam and Adrian could take care of the
implementation into Epics and into the database as soon as possible.
Thanks and a good weekend,
Michael
On Thu, 11 Sep 2003, Adam Jon DeGrush wrote:
> Hi Michael,
>
> I need the following for information each channel.
>
> Channel Name | Crate # | Slot # | Channel Number | Run Voltage (V)|
> Standby Voltage (V)| Trip Current (uA)
>
> Adrian is in charge of the mysql database so he will add them in to the
> BLAST database.
>
> As soon as you give me the info, I can start working on it but it will
> probably take the weekend to finish since there is a lot of code for each
> detector sub-group added.
> Cheers,
> Adam
>
>
> On Thu, 11 Sep 2003, Michael Kohl wrote:
>
> > Hi Adam,
> >
> > yesterday we completed the installation of the LADS neutron counters in
> > the hall. Today I will finish up the HV cabeling in the Dtunnel.
> >
> > In order to operate the HV as soon as possible, I'd like to ask you if you
> > could take care of the implementation into Epics, i.e. into the database
> > (I already have individual values to initialize the phototubes) and into
> > the GUI. I would like to condition the phototubes over the weekend, such
> > that we have a stable system by Monday which we can further set up
> > (the electronics) next week.
> >
> > I could use the dumb terminal to set the voltages, however once there is a
> > reboot or reload from the database, the LADS channels would get zeroed
> > again.
> >
> > Please contact me at Bates (number below), and let me know what you need
> > from me.
> >
> >
> > Thanks and regards,
> >
> > Michael
> >
> >
> >
> > --
> >
> > +-------------------------------------+--------------------------+
> > | Office: | Home: |
> > |-------------------------------------|--------------------------|
> > | Dr. Michael Kohl | Michael Kohl |
> > | Laboratory for Nuclear Science | 5 Ibbetson Street |
> > | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 |
> > | Middleton, MA 01949 | U.S.A. |
> > | U.S.A. | |
> > | - - - - - - - - - - - - | - - - - - - - - -|
> > | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
> > | Work: +1-617-253-9207 | Home: +1-617-629-3147 |
> > | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 |
> > | http://blast.lns.mit.edu | |
> > +-------------------------------------+--------------------------+
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
--+-------------------------------------+--------------------------+ | Office: | Home: | |-------------------------------------|--------------------------| | Dr. Michael Kohl | Michael Kohl | | Laboratory for Nuclear Science | 5 Ibbetson Street | | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 | | Middleton, MA 01949 | U.S.A. | | U.S.A. | | | - - - - - - - - - - - - | - - - - - - - - -| | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de | | Work: +1-617-253-9207 | Home: +1-617-629-3147 | | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 | | http://blast.lns.mit.edu | | +-------------------------------------+--------------------------+
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:30 EST