When it’s desired to allow Booster to start running beam to the Booster Dump, but PREVENT beam to Main Injector, such as after a shutdown and Booster is ready to turn back on but Main Injector is not, then do the following:

 

Coordinate with the Interlocks Group.  They will look at panel near linac-booster junction and confirm that the beam stop is CLOSED. 

 

 

Once Interlocks personnel have confirmed that the BS809 beam stop is CLOSED, then the RSO should PUSH THE BS809 Power BUTTON IN and CLOSE AND LOCK the HASP over the button.  Pushing the button in and locking it off takes power away from the beam stop, so that it cannot be moved once Interlocks has confirmed it is in the CLOSED position.

 

 

 

 

Go to Booster Tower WEST about halfway down and look for this button.  Put an RSO Lock onto  BS809.  This is the beam stop that must be locked in the CLOSED position.  This beam stop INHIBITS beam from getting to the Main Injector from Booster.

 

There is a RUN CONDITION that allows Booster to OPERATE in a DUMP ONLY MODE.  If coming out of a shutdown, all permits and run conditions need to be re-done and re-issued.

 

When Main Injector is READY for BEAM, the RSO Lock may be removed and the button PULLED out to restore power to the BEAM STOP BS809.