Editing Laboratory Preparation (section)

===Connecting High Voltage===

'''1. Preparing High Voltage'''

To remotely access and control the high voltage supply, open the terminal and become super user by typing "su" , followed by the super user password. Once a super user, type "minicom" in the terminal. The serial connection to the HV supply should already be set as the default device, so once minicom is open the terminal should display the controls for the HV. Otherwise, the voltage can be adjusted directly from the power supply by using the knob controller. 

Hint: If the display for the high voltage controller does not appear within minicom type '''caen''' to show the voltage control. 

Hint: If a connection cannot be made the correct USB output needs to be chosen: '''minicom usb1'''

'''2. Attaching Cables'''

On the end of each PMT there is a connector labeled (HV) for high voltage. Here, securely fastened (HV) cables can be connected to the PMTs and linked with the power supply in separate channels. (Channels 0 to 3)

'''3. Polarity'''

Make sure that the polarity on the power supply is set to '''negative'''. If it is not, the polarity can be adjusted by removing the power supply, taking off its rear panel, and switching the polarity. (Refer to the power supply manual for further instruction)