What you see ?




 
 

The MuCAP Slow-control is located on PC620.psi.ch, a PC running windows-2000 in the muE4 area.
It monitors presently the following parameters:

Unless otherwise stated, the average value over a 4 second measurement period is taken.

Temperatures:      Sensor: 100 Ohm  Pt- Resistor (Temp1-4)
                                        1000 Ohm Pt - Resistor (Temp5)
                            Temp1 - Magnet upper  coil
                            Temp2 - Magnet lower coil
                            Temp3 - center of upper half cylinder of hydrogen vessel
                            Temp4 - outside of downstream flansch of hydrogen vessel
                            Temp5 - upstream side of inner copper shielding of ePC1 above the preamps
                            Temp6 - presently not connected
                            1-3, 4-6  display the values of the corrresponding temperaturs

Standard temperatures are:  coil with cooling on: ~ 18 degree C
                                           flansch ~ 25 degree C
                                           The picture above shows the temperature during heating of the  hydrogen vessel.


Magnetic Field:          B1 - Field measured on the upper half of the hydrogen cylinder
                                        B2 - Field measured on the lower half of the hydrogen cylinder
                                                 should be around 0  or 70 Gauss

Hydrogen Pressure:    Pressure Sensor
                                          Hydrogen vessel filled = 9.8 bar

ePC Gas Flow:  piezoelectric pressure meter
                            shows the pressure in the ePC1 gas line, 200 points scanned over 1 second
                                        one sees dips, which correspond to the gas still bubbling
                            ePC chamber gas flow: shows  the average value of ePC gas flow in 4 seconds.
                                        non flat means the gas is still bubbling                          

Currents in TPC anodes and cathodes:   Heidelberg custom made current meter
                               currents usually drift between 0 and 10 nA

Set Trip Currents for both channels
                                Standard:  50 nA and 160 nA  (internally multiplied times 5 to give the real current in nA)

Trip Alarm:   The Trip Alarm goes on when one of the currents shows a reading above 199 nA  at least one time.


PSI-Channels:  Shows the input of the PSI parallel port slow-control crate which will be located in the MuCAP electronics upstairs.

The little radar-smiley shows you if the page is still  being renewed or if you look at an old page.


Current data file: show the filename and path where the present data are saved.
                                        You can select a file name on program start 9 when you click the arrow
                                    all input data are on file, also the channels which are not displayed presently.
                                    the file displays  date, time, scannumber,  24 channels from the PC620 daq-cards, 2 channels from the RS232 connection,
                                                                                                    8 channels from the mu-logger