The basic OSIRIS system consists of 2 PCs and a Linux data taking computer (soaric2) as well as the instrument itself. The instrument control software is called ICIMACS: Instrument Control and Image Acquisition System.
One PC is located on the instrument: the "IE". The IE boots on
and starts its program automatically (ieosiris.exe). The IE handles low
level motor control. The other two PCs are located in the computer room
and are connected to each other and the linux machine, soaric2. The IC
is the instrument
computer. It handles the basic instrument control and data taking
the detector readout). The monitor and keyboard for the IC are
the console room. The IC computer and all monitors can be
powered off when
OSIRIS is not in use.
1.) Osiris may be cooled down whether or not the instrument
electronics are activated. Make sure the vacuum is good before cooling.
At a minimum, the vaccuum should
be 100 mTorr or less. Ideally, if there is time, we should pump
on the dewar until the vacuum is below about 10 mTorr. If OSIRIS has
been warm for several months or more, a pressure > 100 mTorr might
indicate a leak.
2.) Attach an LN2 transfer line using a threaded fitting to the
OSIRIS fill tube, and fill
until LN2 vents from the other side of the instrument. Never use a wrench to install or remove
the LN2 transfer line! If needed, use a heat gun to remove the tank
transfer line. If this is the
first fill from a warm state, fill again in about 1 hr. OSIRIS should
be useable in 24 hr. OSIRIS takes about 30 liter of LN2. Once cold, a
full tank will last more than 36 hr. However, on SOAR we expect OSIRIS
to run with less LN2 due to its mounting on the Naysmith platform. OSIRIS should be
checked every 10-12 hr for LN2 fill while being used.
3.) Always replace the OSIRIS fill tube cap (tapa) after removing
LN2 fill tube. This prevents LN2 from venting through the fill
tube and causing the O-ring there to leak.
Never move OSIRIS mechanisms while OSIRIS is being cooled from room
temperature to LN2 temperature. A safe period to wait is 24hr
afer the first fill if OSIRIS is filled as indicated above.
5.) Typically, one can let OSIRIS warm up by itself. Dump the
LN2 and wait until it is back to room temp to open. In emergencies, an
internal heater can be activated. Call Brooke Gregory or Sean Points
if this is required.
1.) Go up to the telescope. There are two electronics boxes on the instrument. These are the HE (Head Electronics, which run the detector) and IE (Instrument Electronics, which does the low level motor control).
If Prospero reports one or more of the links to the instrument computers as down, first check that the connections have all been properly made and/or that they are clean and solid. Once the connections are verified, try restarting (rebooting) the computer in question (don't forget the IE computer is on the instrument in the IE box). Refer to the Prospero manual (available in the console room, or on-line) for Prospero questions. More troubleshooting information is available here.