SPECS 2D-CCD, Руководство пользователя

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User Manual | Status 10.12.2015 | Version 1.0
Table of contents
1 Introduction ....................................................................................................................... 5
About .................................................................................................................................. 5 1.1
Information ........................................................................................................................ 5 1.2
Safety .................................................................................................................................. 6 1.3
2 Preliminary tasks ............................................................................................................... 7
Baking out .......................................................................................................................... 7 2.1
Vacuum conditions ............................................................................................................ 8 2.2
Electrical connections ........................................................................................................ 8 2.3
2.3.1
Connecting the SPECS power supplies ............................................................................. 9
2.3.2 Connecting the Focus power supplies ............................................................................. 9
2.2 Degassing the Ferrum detector ...................................................................................... 11
2.3 Fitting the CCD camera.................................................................................................... 11
Fitting the alignment camera .......................................................................................... 11 2.4
Degassing the detector ................................................................................................... 11 2.5
2.4
Conditioning the spin detector ....................................................................................... 13
3 Operation ......................................................................................................................... 14
3.1 Using templates to set up experiments ......................................................................... 14
Templates for the 2D-CCD / 3D-VLEED detector ........................................................... 17 3.1
3.1.1
PHOIBOS 1D Adjustment ................................................................................................ 17
3.1.2 PHOIBOS 1D DVS ............................................................................................................. 17
3.1.3 Scattering Energy Scan .................................................................................................... 18
3.1.4 PHOIBOS Spin Adjustment ............................................................................................. 18
3.1.5 UPS Spin Step Profile ....................................................................................................... 19
Performing CCD measurements ..................................................................................... 19 3.2
Viewing results ................................................................................................................. 20 3.3
3.3.1
Calculating the spin asymmetry ..................................................................................... 20
Using the Image View to display results ........................................................................ 22 3.4
4 Troubleshooting............................................................................................................... 23
4.1 Amplifier check ................................................................................................................ 23
4.2 Discriminator threshold .................................................................................................. 24
4.3 Noise ................................................................................................................................. 25
4.4 Checking the voltages ...................................................................................................... 25
4.1.1 Detector settings .............................................................................................................. 25
4.1.2 Voltages ............................................................................................................................ 26
4.1.3 Rotator .............................................................................................................................. 27
4.5 Capacitances .................................................................................................................... 27