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Callisto Production Receivers

Notes from 5 April Receiver Handover

People present: Simon Ellingsen, Jamie McCallum (UTAS), Rémi Rayet (Callisto)

  • The production receivers have a lower rate of outgassing that the prototype, now at 4-6 x 106 mbar litre/sec. The maximum pressure for which the receiver can achieve cooldown is 100 mbar
  • The pressure increase rate depends on the temperature and humidity of the environment, a high temperature and high humidity increases the rate due to the reduced sealing capacity of the o-rings and mylar window.
  • It is recommended that we check the pressure at least once a year, since as the pressure increases the thermal load will impact the base temperature.
  • Section 5.3 of the User Manual has the produced for vacuum recycling. The receiver doesn't need to be cool or cooling to vacuum recycle. It needs a pump which can achieve 0.1 mbar (dry pump preferred).
  • The production receivers have a lower power cooler, which has reduced the vibrations. The system has a slower ramp up to maximum power, then a reduction once the base temperature is achieved.
  • The LNA temperature can go below the set point if the ambient temperature is less than approximately 10 deg Celsius.
  • The CAL box is filled with silica hydrogel, it should not be opened without talking to Callisto first.
  • There is no spare raydome with the receiver, it can be replaced, but contact Callisto beforehand.

Documentation from Callisto

Remote Connection Information

You can connect to the receiver monitoring and control PCs from within the UTAS network using the Microsoft Remote Desktop client software. At present (5 May 2017), the three machines have IP addresses 131.217.63.236 (receiver 1), 131.217.63.237 (receiver 3) and 131.217.63.238 (receiver 2). The connection requires a username and password (which can be found in the User manual).

To set this up we had to change network settings as outlined in section 4.2.1 of the user manual. At Mt Pleasant the subnet mask and gateway need to be set to 255.255.255.128 and 131.217.63.129 respectively.

Log of Receiver Commissioning Activities

  • Thursday 27 April: Receiver 1 received at Mt Pleasant.
  • Monday 1 May: Receivers 2 and 3 received at Mt Pleasant.
  • Thursday 4 May: Simon and Brett perform customer check at reception for receiver 2 and set it to cooldown.
  • Friday 5 May: Simon and Brett perform customer check at reception for receivers 3 and 1. Receiver 3 set to cooldown. Receiver 1 showed ShockWatch triggered in receiver box and shows Com Error with cooler system - doesn't cool. Couriers, University insurance and Callisto informed of issue.
/home/www/auscope/opswiki/data/pages/hardware/callistoreceivers.txt · Last modified: 2017/05/05 07:20 by Simon Ellingsen