Title :
The Prototype Inductive Adder With Droop Compensation for the CLIC Kicker Systems
Author :
Holma, Janne ; Barnes, Michael J.
Author_Institution :
Eur. Lab. for Particle Phys., CERN, Geneva, Switzerland
Abstract :
The Compact Linear Collider (CLIC) study is exploring the scheme for an electron-positron collider with high luminosity and a nominal center-of-mass energy of 3 TeV. The CLIC predamping rings and damping rings (DRs) will produce, through synchrotron radiation, an ultralow emittance beam with high bunch charge. To avoid beam emittance increase, the DR kicker systems must provide extremely flat, high-voltage, pulses. The specifications for the extraction kickers of the DRs are particularly demanding: the flattops of the pulses must be ±12.5 kV with a combined ripple and droop of not more than ±0.02% (±2.5 V). An inductive adder is a very promising approach to meeting the specifications. Recently, a five-layer prototype has been built at CERN. Passive analog modulation has been applied to compensate the voltage droop, for example of the pulse capacitors. The output waveforms of the prototype inductive adder have been compared with predictions of the voltage droop and pulse shape. Conclusions are drawn concerning the design of the full-scale prototype inductive adder.
Keywords :
adders; electron accelerators; linear colliders; nuclear electronics; particle beam bunching; particle beam extraction; synchrotron radiation; CERN; CLIC kicker systems; CLIC predamping rings; bunch charge; center-of-mass energy; compact linear collider; damping rings; droop compensation; electron volt energy 3 TeV; electron-positron collider; extraction kickers; luminosity; passive analog modulation; prototype inductive adder; pulse capacitors; pulse shape; synchrotron radiation; ultralow emittance beam; voltage droop; Adders; Capacitors; Inductance; Modulation; Prototypes; Resistance; Resistors; Analog modulation; CLIC; droop compensation; inductive adder; kicker system; pulse power modulator; pulse power modulator.;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2014.2312033