Laboratory Measurements on Two ±12.5 kV Inductive Adders with ±0.02% Waveform Stability for CLIC Damping Ring Extraction Kickers

Janne Holma; M.J. Barnes; Agnieszka Chmielinska; Montserrat Pont

doi:10.18429/JACOW-IPAC2019-THPRB073

Laboratory Measurements on Two ±12.5 kV Inductive Adders with ±0.02% Waveform Stability for CLIC Damping Ring Extraction Kickers

Janne Holma (Corresponding author), M.J. Barnes, Agnieszka Chmielinska, Montserrat Pont

Not published at VTT

European Organization for Nuclear Research (CERN)

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific

Abstract

The CLIC study is investigating the technical feasibil-ity of an electron-positron collider with high luminosity and a nominal centre-of-mass energy of 3 TeV. Pre-damping rings and damping rings (DRs) will produce ultra-low emittance beam with high bunch charge. The DR kicker systems must provide extremely stable field pulses to avoid beam emittance increase. Each DR extrac-tion kicker system consists of a set of striplines and two pulse modulators. Specifications for this system require that the modulator produce pulses of 900 ns flattop dura-tion, ±12.5 kV and 305 A, with ripple and droop of not more than ±0.02 % (±2.5 V) with respect to a reference waveform. Inductive adder topology has been chosen for the pulse modulators. Two full-scale, 20-layer, 12.5 kV prototype inductive adders have been designed, built and tested at CERN. This paper presents the measurements of the stability of these adders for two different waveforms: a flat-top waveform and a controlled decay waveform, the latter of which is required to generate flat-top total field for the CLIC DR extraction stripline kicker.

Original language	English
Title of host publication	IPAC2019 Proceedings of the 10th International Particle Accelerator Conference
Publisher	JACoW Publishing
Pages	3978-3981
ISBN (Electronic)	978-3-95450-208-0
DOIs	https://doi.org/10.18429/JACOW-IPAC2019-THPRB073
Publication status	Published - 22 May 2019
MoE publication type	B3 Non-refereed article in conference proceedings

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Holma, J., Barnes, M. J., Chmielinska, A., & Pont, M. (2019). Laboratory Measurements on Two ±12.5 kV Inductive Adders with ±0.02% Waveform Stability for CLIC Damping Ring Extraction Kickers. In IPAC2019 Proceedings of the 10th International Particle Accelerator Conference (pp. 3978-3981). Article THPRB073 JACoW Publishing. https://doi.org/10.18429/JACOW-IPAC2019-THPRB073

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abstract = "The CLIC study is investigating the technical feasibil-ity of an electron-positron collider with high luminosity and a nominal centre-of-mass energy of 3 TeV. Pre-damping rings and damping rings (DRs) will produce ultra-low emittance beam with high bunch charge. The DR kicker systems must provide extremely stable field pulses to avoid beam emittance increase. Each DR extrac-tion kicker system consists of a set of striplines and two pulse modulators. Specifications for this system require that the modulator produce pulses of 900 ns flattop dura-tion, ±12.5 kV and 305 A, with ripple and droop of not more than ±0.02 % (±2.5 V) with respect to a reference waveform. Inductive adder topology has been chosen for the pulse modulators. Two full-scale, 20-layer, 12.5 kV prototype inductive adders have been designed, built and tested at CERN. This paper presents the measurements of the stability of these adders for two different waveforms: a flat-top waveform and a controlled decay waveform, the latter of which is required to generate flat-top total field for the CLIC DR extraction stripline kicker.",

author = "Janne Holma and M.J. Barnes and Agnieszka Chmielinska and Montserrat Pont",

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doi = "10.18429/JACOW-IPAC2019-THPRB073",

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Laboratory Measurements on Two ±12.5 kV Inductive Adders with ±0.02% Waveform Stability for CLIC Damping Ring Extraction Kickers. / Holma, Janne (Corresponding author); Barnes, M.J.; Chmielinska, Agnieszka et al.
IPAC2019 Proceedings of the 10th International Particle Accelerator Conference. JACoW Publishing, 2019. p. 3978-3981 THPRB073.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific

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AB - The CLIC study is investigating the technical feasibil-ity of an electron-positron collider with high luminosity and a nominal centre-of-mass energy of 3 TeV. Pre-damping rings and damping rings (DRs) will produce ultra-low emittance beam with high bunch charge. The DR kicker systems must provide extremely stable field pulses to avoid beam emittance increase. Each DR extrac-tion kicker system consists of a set of striplines and two pulse modulators. Specifications for this system require that the modulator produce pulses of 900 ns flattop dura-tion, ±12.5 kV and 305 A, with ripple and droop of not more than ±0.02 % (±2.5 V) with respect to a reference waveform. Inductive adder topology has been chosen for the pulse modulators. Two full-scale, 20-layer, 12.5 kV prototype inductive adders have been designed, built and tested at CERN. This paper presents the measurements of the stability of these adders for two different waveforms: a flat-top waveform and a controlled decay waveform, the latter of which is required to generate flat-top total field for the CLIC DR extraction stripline kicker.

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Laboratory Measurements on Two ±12.5 kV Inductive Adders with ±0.02% Waveform Stability for CLIC Damping Ring Extraction Kickers

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