Ferdi Franceschini 2008-08-29 16:47 The driver is loaded into SICS by adding the following line in the /usr/local/sics/extraconfig.tcl file select_environment_controller "11TMagnet" Make sure that the other entries are commented out, save the file and restart SICS. This will set up the lakeshore temperature controller as well as the magnet power supply control. They will appear as tc1 and ips120 under the sample group in GumTree. When the magnet power supply is switched on it sets itself to "clamped" mode. This means that the output is short-circuited. You must unclamp it to set the magnetic field. hset /sample/ips120/Control/A 0 Unclamps the magnet It will show that it's at zero already, set it anyway drive ips120_driveable n Drive the magnet to n Tesla /sample/ips120/sensor/value This reading is taken from the power supply leads while the magnet is ramping up. After the setpoint has been reached and the magnet is "holding" the field then SICS will read the field from the magnet status register of the power supply. The magnet is normally in persistent mode (switch heater off) with the power supply at zero amps. The drive command drives the power supply to the magnet current, takes the magnet out of persistent mode (turns the switch heater on), drives the magnet to the new field, returns the magnet to persistent mode (turns the switch heater off) and ramps the power supply current back to zero. There are time delays to allow the switch to operate. If you set the limits to run at maximum magnet field, but do not run the lambda plate, you will quench the magnet. This driver does not check to see if the magnet temperature when driving maximum field. The SICS anticollider should be used to set allowed values.