The fast pulse generated by the Blumlein is monitored at two points. An antenna sensitive to changes in electric field is located at the downstream end of the Blumlein. It is a simple
E-field probe that monitors the changing field on the middle conductor of the tri-axial line. A loop antenna, adjacent to the electrodes that couple to the kicker plates measures the
changing current. The loop antenna coupler is at the entrance to the vacuum chamber.
The signals from both pickups should be integrated to give Voltage and Current and terminated in high impedance (1M Ohm).
The BNC connector at the vacuum chamber port
couples to the pickup loop.
New style short profile pickup loop monitors current at high voltage feedthrough
The BNC connector at the downstream end of the Blumlein couples to an antenna that measures electric field (Voltage) on the middle conductor. The fast pulse requires high impedance termination.
Lower trace is current monitor at dummy load. Upper trace is from pickup at the end of the Blumlein
Replacement of kicker 1 HV insulator- May 2017 (Hogan)pptx and pdf
Upgrade of HV feedthrough - August 22, 2017 (Hogan) pptx and
pdf
Description of current pickup at kicker, voltage monitor at end of blumlein and voltage on charging transformer secondary
pdf and pptx September 30, 2017
Pickup loop. Voltage on the in vacuum loop is induced by changing current in electrode.
