nELBE fission chamber manual
To get the nELBE fission chambers (FC) running perform the following steps:
- check P10 bottle pressure
- go to bottle rack outside of ELBE building using the emergency exit door opposite to the stairway to nELBE electronics hut (542/250)
- if nessecary turn bottle selection valve
- pressure in gas pipe to cave should be approx. 10 bar
- connect tubes and leave the bypasses before gas supply and fission chamber (FC) open
- swith on the gas supply crate
- open P10 valve at the wall to get a pressure of 200 mbar (500 mbar max.)
- open needle valve at the wall
- open FC gas outlet valve
- open FC gas inlet valve
- close bypass before gas supply crate
- on FWK109 (electronics hut 542/250):
- double click FlowDDE
- Communication -> Open Communication
- double click FlowView
- click 2x new to open a window for each element
- set channels to 1 (EL-Press), 2 (EL-Flow) and 3 (Control)
- set flow to 20 ml/min
- double click FlowDDE
- close FC bypass -> pressure should rise (100 % = 200 mbar)
- on FWK109
- double click FlowPlot
- configure plot:
- line 1 -> channel 1, para 8 (Measure)
- line 2 -> channel 2, para 9 (Setpoint)
- line 3 -> channel 2, para 8 (Measure)
- do not change the poll time!
- click OK
- configure acquisition
- Extra -> Option
- visible history 1800 s
- total history 3600000 s
- data acquisition 1000 ms
- memorize file location
- Extra -> Option
- set scale to 25 % max.
- click Start
- configure plot:
- double click FlowPlot
- flush FC by setting flow to 200 ml/min for about 30 min
- set flow to 20 ml/min
- switch on HV
- UFC: 150 V
- PuFC: 300 V