Erk Jensen

European Organization for Nuclear Research

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Michael Benedikt

European Organization for Nuclear Research

Daniel Schulte

European Organization for Nuclear Research

M. Seidel

École Polytechnique Fédérale de Lausanne

M. Lamont

European Organization for Nuclear Research

A. Yamamoto

High Energy Accelerator Research Organization

A. De Roeck

European Organization for Nuclear Research

Frank Zimmermann

European Organization for Nuclear Research

U. Klein

University of Liverpool

A. Ceccucci

European Organization for Nuclear Research

Verónica Sanz

Universitat de València

Cooperative Institutions

European Organization for Nuclear Research

190

Thomas Jefferson National Accelerator Facility

Centre National de la Recherche Scientifique

Brookhaven National Laboratory

Fermi National Accelerator Laboratory

Institut National de Physique Nucléaire et de Physique des Particules

Cockcroft Institute

A. Alikhanyan National Laboratory

University of Liverpool

Istituto Nazionale di Fisica Nucleare

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Physics Briefing Book

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

R. Keith Ellis B. Heinemann Jorge de Blas M. Cepeda Christophe Grojean

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Physics Briefing Book

R. Keith Ellis B. Heinemann Jorge de Blas M. Cepeda Christophe Grojean

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Physics Briefing Book

R. Keith Ellis B. Heinemann Jorge de Blas M. Cepeda Christophe Grojean

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An energy recovery electron accelerator for DIS at the LHC

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) (2014)

Daniel Schulte M. Klein Oliver Brüning Frank Zimmermann Erk Jensen

10.22323/1.180.0555

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PERLE - Lattice Design and Beam Dynamics Studies

HAL (Le Centre pour la Communication Scientifique Directe) (2018)

Alex Bogacz D. Angal-Kalinin G. Arduini S. Bousson Oliver Brüning

PERLE (Powerful ERL for Experiments) is a novel ERL test facility, initially proposed to validate choices for a 60 GeV ERL foreseen in the design of the LHeC and the FCC-eh. Its main thrust is to probe high current, CW, multi-pass operation with superconducting cavities at 802 MHz (and perhaps testing other frequencies of interest). With very high virtual beam power (~ 10 MW), PERLE offers an opportunity for controllable study of every beam dynamic effect of interest in the next generation of ERL design; becoming a ‘stepping stone' between present state-of-art 1 MW ERLs and future 100 MW scale applications. PERLE design features Flexible Momentum Compaction lattice architecture for six vertically stacked return arcs and a high-current, 6 MeV, photo-injector. With only one pair of 4 cavity cryomodules, 400 MeV beam energy can be reached in 3 re-circulation passes, with beam currents in excess of 15 mA. The beam is decelerated in 3 consecutive passes back to the injection energy, transferring virtually stored energy back to the RF. This unique facility will serve as a test-bed for high current ERL technologies, as well as a user facility in low energy electron and photon physics.

Beam dump

10.18429/jacow-ipac2018-thpmk105

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ENERGY EFFCIENCY OF PARTICLE ACCELERATORS - A NETWORKING EFFORT WITHIN THE EuCARD2 PROGRAM ∗

5th Int. Particle Accelerator Conf. (IPAC'14), Dresden, Germany, June 15-20, 2014 (2014)

J. Stadlmann R. Gehring Erk Jensen Thomas Parker M. Seidel

EuCARD2 is an Integrating Activity Project for coordinated Research and Development on Particle Accelerators, co-funded by the European Commission under the FP7 Capacities Programme. Within the network EnEfficient we address topics around energy efficiency of research accelerators. The ambitious scientific research goals of modern accelerator facilities lead to high requirements in beam power and beam quality for those research accelerators. In conjunction with the users' needs the power consumption and environmental impact of the research facilities becomes a major factor in the perception of both funding agencies and the general public. In this network we combine and focus the R&D done individually at different research centers into a series of workshops. We cover the topics “Energy recovery from cooling circuits“, “Higher electronic efficiency RF power generation“, “Short term energy storage systems”, “Virtual power plants” and “Beam transfer channels with low power consumption”. Our network activities are naturally open to external participants. With this work we will introduce our energy efficiency topics to interested participants and contributors from the whole community. (Less)

10.18429/jacow-ipac2014-thpri102

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Improving the Energy Efficiency of Accelerator Facilities

M. Seidel R. Gehring Erk Jensen Thomas Parker P. Spiller

New particle accelerator based research facilities tend to be much more productive, but often in coincidence with higher energy consumption. The total energy consumption of mankind is steeply rising and this is mainly caused by quickly developing countries. Some European countries decided to terminate nuclear power generation and to switch to sustainable energy production. Also the CO2 problem gives rise to new approaches for energy production and in all strategies the efficiency of utilization of electrical energy plays an important role. For the public acceptance of particle accelerator projects it is thus very important to optimize them for best utilization of electrical energy and to show these efforts to funding bodies and to the public. Within the European accelerator development program Eucard-2 [1] we organise a network EnEfficient [2] that aims at improving the energy efficiency of accelerators. In this paper we give some background information on the political situation, we describe the power flow in accelerator facilities and we give examples for developments of efficient accelerator systems, such as magnets, RF generation, heat recovery and energy management.

Consumption

10.18429/jacow-ipac2015-wexc3

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Vacuum electronics applications at CERN

Erk Jensen

CERN operates a large number of vacuum electronics based RF power amplifiers covering a wide frequency range - over 300 sockets with 24 different grid tubes and klystrons are in use and require constant care to insure reliable operation of the accelerators. This is in particular true for the LHC and its injector chain, for which a program of improvement and stepwise upgrade has started. These include IOT's for the SPS and klystrons and modulators for Linac4 and SPL. The CLIC study and the CTF3 facility are relevant to vacuum electronics in many ways: The CLIC primary RF power, to be provided at 1 GHz, requires highest possible efficiency and phase stability, MBK's are likely candidates. The CLIC RF power source and CTF3 are themselves large vacuum electronics applications, consequently there are areas of common interest and concern, including fabrication techniques, pulse compression techniques, breakdown and multipactor theory and simulation, material fatigue, numerical analysis of slow-wave structures, vacuum compatible ceramics and damping materials, just to name a few.

Klystron

Power Electronics

Upgrade

10.1109/ivelec.2009.5193353

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A six-channel seismic amplifier

Antarctica A Keystone in a Changing World (1990)

Erk Jensen

10.3133/ofr90346

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A simple self-consistent analysis of the gyrotron

Erk Jensen A. Jöstingmeier

A non-linear, multi-mode, time-domain analysis of the gyrotron is proposed. The e.m. fields are expanded into empty cavity modes, yielding a set of ordinary differential equations for the time-dependent expansion coefficients. These equations are coupled to the equations of electron motion. — Transient and steady-state characteristics are thus calculated.

Gyrotron

Transient (computer programming)

Transient analysis

Mode (computer interface)

10.1109/irmm.1985.9126656

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