Janne Holma

CLIC readiness report

E. Adli, G. D’Auria, Nuria Catalán Lasheras, Vera Cilento et autres

Abstract The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear e + e − collider studied by the international CLIC and CLICdp collaborations hosted by CERN. CLIC uses a two-beam acceleration scheme, in which normal-conducting high-gradient 12 GHz accelerating structures are …

SAP automation using Robot Process Automation

Janne Holma

This is a thesis about Robot Process Automation, RPA. A trending technology used in multiple business areas where all kinds of virtual office jobs are needed to perform faster and with excellence. RPA is relatively new subject and there is not much …

Measurements on a 12.5/17.5 kV Inductive Adder with Extremely High Stability for the Damping Ring Kickers of the Compact Linear Collider at CERN

Janne Holma, Michael Barnes

The specifications for the kicker systems for the Compact Linear Collider call for 900 ns duration pulses of ±12.5/±17.5 kV, of up to 433 A, with combined ripple and droop of not more than ±0.02% at 12.5 kV. Measured pulse waveforms of …

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Measurements on Combined 12.5/17.5 Kv Prototype Inductive Adder for the Clic Dr Kickers

Janne Holma, Michael Barnes, Viliam Senaj

The CLIC study is investigating the technical feasibility of an electron-positron collider with high luminosity and a nominal centre-of-mass energy of 3 TeV. The pre-damping rings (PDR) and damping rings (DRs) will produce ultra-low emittance beam with high bunch charge. To avoid …

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

Janne Holma, Michael Barnes, Agnieszka Chmielińska, Montserrat Pont

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 …

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Beam-Based Measurements on Two ±12.5 kV Inductive Adders, together with Striplines, for CLIC Damping Ring Extraction Kickers

Janne Holma, Michael Barnes, Michele Carlà, Ubaldo Iriso et autres

The CLIC study is investigating the technical feasibil-ity of an electron-positron linear collider with high lumi-nosity 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 …

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Prototype Inductive Adders With Extremely Flat-Top Output Pulses for the Compact Linear Collider at CERN

Janne Holma, Michael Barnes

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 (DRs) and DRs will produce, through synchrotron radiation, ultralow emittance beam with high …

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Prototype Inductive Adder for the Proton Synchrotron at CERN

D. Woog, Michael Barnes, Janne Holma, Thomas R. Kramer

Several prototype inductive adders (IAs), for use with kicker systems, each with very different specifications, are under construction at CERN. Historically pulse generators for kicker systems use thyratrons and either a Pulse Forming Network (PFN) or a Pulse Forming Line (PFL). The …

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Measurements on +/-12.5 kV Inductive Adders with +/-200 ppm Pulse Flatness over 900 ns for CLIC Damping Ring Kickers at CERN

Janne Holma, Michael Barnes, David Woog

The CLIC study is investigating the technical feasibility 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 …

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Demonstration of Feasibility of the CLIC Damping Ring Extraction Kicker Modulators

Janne Holma, Michael Barnes, Alvaro Ferrero Colomo

The CLIC study is investigating the technical feasibility 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 …

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First Prototype Inductive Adder for the FCC Injection

David Woog, Michael Barnes, Janne Holma, Thomas Krämer

A highly reliable kicker system is required as part of the injection for the FCC. A significant weak point of conventional kicker systems is often the pulse generator, where a Pulse Forming Network/Line (PFN/PFL) is discharged through a thyratron switch to generate …

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Design of an Inductive Adder for the FCC injection kicker pulse generator

D. Woog, Michael Barnes, L. Ducimetière, Janne Holma et autres

The injection system for a 100 TeV centre-of-mass collider is an important part of the Future Circular Collider (FCC) study. Due to issues with conventional kicker systems, such as self-triggering and long term availability of thyratrons and limitations of HV-cables, innovative design …

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