<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
Hi, <br>
<br>
I pasted the minutes of the last HPS controls meeting to this
message <br>
and posted them on the wiki: <br>
<br>
<a class="moz-txt-link-freetext" href="https://confluence.slac.stanford.edu/display/hpsg/2014.03.19+Biweekly">https://confluence.slac.stanford.edu/display/hpsg/2014.03.19+Biweekly</a><br>
<br>
Better late than never. <br>
Hovanes.<br>
<br>
<br>
<h2 id="id-2014.03.19Biweekly-Minutes">Minutes</h2>
<h5 id="id-2014.03.19Biweekly-SVTVoltagecontrol">SVT Voltage control</h5>
<ul>
<li>Hovanes and Sergey got an MPOD crate from CLAS12 SVT for
temporary use with 3 low voltage and 3 bias boards.</li>
<li>Hovanes started an IOC on clonioc2 server in the counting
house. The IOC at this time has the bias voltages and FE LV
channels. </li>
<li>The IOC is using the Hall D scheme (Nerses) for configuring
the EPICS DB based on the MPOD chassis content and on a SQLite
DB for detector hierarchy.</li>
<li>The mapping of the detector channels into the MPOD channels is
arbitrary at this point. Pelle will create an Excel file with
the correct mapping and send to Hovanes. </li>
<li>Bryan gave a presentation on his progress on the SVT voltage
control GUIs.
<ul>
<li>Bryan crated an overview GUI for SVT voltages and the
detail view for the voltage parameters for the bias voltages
and FEC voltages. </li>
<li>Pelle asked Bryan to setup a button for group operations
(at this point just ALL CHANNELS grouping, but in the future
TOP and BOTTOM group operation might be needed). </li>
</ul>
</li>
<li>Pelle reported that Ryan and himself will meet with an EPICS
expert to discuss and start working on the DAQ CA server for
voltages and the SVT temperatures. </li>
<li>Ani Simonyan started working on the alarm configuration for
the SVT voltages.</li>
<li>Still unclear when would the right time be for Bryan to travel
to SLAC to setup SVT voltage controls in EPICS. </li>
</ul>
<h5 id="id-2014.03.19Biweekly-Motorsetup">Motor setup</h5>
<ul>
<li>Hovanes reported that it was decided to use a Newport XPS-Q8
motion controller for the HPS SVT motor control.</li>
<li>Most applications will not be affected much by this change
with the exception of scans. Hall D is using these controller
and the scan procedure will be developed together with Hall D
folks. </li>
<li>Armen from JLab Fast Electronics group is working on the three
SVT motor cables. He is ordering the cables and connectors. </li>
<li>Ani Simonyan (Yerevan) will start working on the scan software
in April. </li>
<li>For now the other six motors will be using the Hall B standard
scheme with OMS drivers. If we decide to move some of them to
XPS, then we will use short adapter cables to connect them to
XPS. </li>
</ul>
<h5 id="id-2014.03.19Biweekly-Chillercontrols">Chiller controls</h5>
<ul>
<li>Stepan ordered a chiller that will first be used for ECAL
test, and later will be used for the SVT FEC cooling. </li>
<li>Since this chiller will also be in vacuum, it needs to be
interlocked similar to the main SVT chiller (Pelle). </li>
<li>A bypass circuit with solenoid valves will need to be
installed on the chiller for the interlock to be able to shut
off the coolant flow. </li>
<li>A mass flow meter will need to be installed in the piping to
be able to shutoff the power supplies when there is not
sufficient flow of coolant. </li>
</ul>
<p> </p>
<h2 id="id-2014.03.19Biweekly-Actionitems">Action items</h2>
<ul>
<li>Hovanes will implement the flange LV and hybrid LV channels in
EPICS IOC and let Bryan know.</li>
<li>Ani will crate a preliminary version of the alarm
configuration for SVT voltages.</li>
<li>Cables for the motors will be build at JLab and Hovanes will
sent at least one of them to Takashi. </li>
<li>Pelle will check with SVT engineers about the bypass flow and
the flow meter for the FEC chiller. </li>
<li>Hovanes, Stepan and F.-X. will stay in touch with JLab PSS
group regarding the accelerator's FSD input for SVT interlocks
and come up with a plan by the end of February. (from the
previous meetings)</li>
<li>Pelle will find out when the SVT full test at SLAC will take
place and let Bryan know by April , so that Bryan can make
plans. (from previous meetings)</li>
<li>F-X. will send a drawing of where the beamline motors need to
be for HPS 2015 so that Denny can start procuring and making
motor cables and laying them in the Hall. (from previous
meetings)</li>
</ul>
<br>
</body>
</html>