SEE Control

SEE Control

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The SEE slow control system panel is shown in the figure below:

The numbers in the description below refer to the numbers on the diagram.

1. The SEETF control panel provides a graphical user interface that allows you to recall slow control settings packages that have been created by the NSCL staff by the beam species and energy.
2. All of the controls devices are plugged into the SEETF VME crate backplane. You will interact with the SEETFDAQ slow control system through the graphical user interface (GUI). provided by this control pane.
3. Detector Bias is supplied by three ISEG VME high voltage VME power supplies. Each supply has two channels. Two of the supplies bias the four quadrant scintillator. The third supply provides bias for the PPAC. The control GUI sets the target voltages and ramp rates for these devices, and allows you to initiate ramps and shutdowns.
4. Detector trigger determination is provided by a CAEN V812 constant fraction discriminator. This module is programmed by the SEETF control panel when a settings package is selected. It is also programmed by the Readout software whenever a run starts.
5. The CAEN N568 is a NIM spectroscopy amplifier module. It is remotely programmable through it's CAENnet interface. CAENnet is a proprietary serial bus and protocol developed by CAEN. A CAENnet controller module in the VME bus allows the SEETF control panel to setup this module. The N568 is programmed as soon as a settings package has been selected. It is also programmed by the Readout subsystem whenever a run starts.

The SEETF slow control system is turnkey. NSCL staff will develop and store appropriate settings packages for each type beam particle and energy you will use. The control panel GUI allows you to:

• Select the settings pacckage appropriate to the beam you will use in your experiment
• Ramp detector bias supplies on and off and monitor the status of the bias supplies.

The SEETF GUI is shown in the figure below:

The numbers in the description below refer to the numbers that label the figure.

1. The "Select Beam" button pops up a cascading menu that allows you to specify the beam you are using by first selecting a particle type and then the energy. When you select the beam, the button will display the particle and energy. Note that as soon as you select an Ion and energy, the settings package associated with this beam is copied into your experiment directory ( /experiment/config), and the control panel sets up both the shaping amplifier and the constant fraction discriminator.
2. This scintillator status section displays the status of the trip conditions for the two supplies that bias the four segment scintillator.
3. This PPAC status ssection displays the status of the trip conditions for the supply that biases the PPAC.
4. This scintillator status section displays the requested and actual voltages on the four channels biased by the scintillator bias supplies.
5. This PPAC status display shows the requested and actual voltage for the PPAC bias supply.
6. The buttons in this section of the GUI allow you to initiate power supply ramps for the bias supplies. The ramp speed is specified in the settings package that you selected when you specified the Ion and energy. When you initiate a ramp, the corresponding buttons turn into off buttons. You may turn off a supply set at any time, even if the ramp has not yet completed. The turn off ramps the power supply to zero at the fastest rate supported by the hardware.
7. This scrolling window captures output information from the control panel. It logs the initiation of ramps, trips and their recoveries. Information sent to this window is also logged to file in  /experiment/Controls.log

SEE Control