1. 
   PA Crowbar
   Linac RF system trip that occurs when the modulator current is greater than 600 amps during the RF pulse or 125 amps between pulses. A PA crowbar fires the permanent inhibit, shorts the capacitor bank to ground through the ignitron, and resets automatically after 30 seconds.
   Found op http://www-bdnew.fnal.gov/operations/accgloss/gloss.html
   
   
2. 
   PA Crowbar
   Linac RF system trip that occurs when the modulator current is greater than 600 amps during the RF pulse or 125 amps between pulses. A PA crowbar fires the permanent inhibit, shorts the capacitor bank to ground through the ignitron, and resets automatically after 30 seconds.
   Found op http://www-bdnew.fnal.gov/operations/accgloss/gloss.html#A
   
   

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