RF Cavities

RF cavities such as RFQs, IH-Drift Tube Linacs, Cross Bar H-Mode cavities, spiral bunchers or quarterwave bunchers have been developed by BEVATECHs specialists for multiple facilities around the world. We do offer services for replacement of older structures or energy upgrades.

References:

• Accelerated radioactive beams from REX-ISOLDE
• Commissioning of the Linac for the Heidelberg Heavy Ion Cancer Therapy Centre (HIT)
• Status of the Linac Components for the Italian Hadrontherapy Centre CNAO
• RF Setup of the MedAustron RFQ
• Radioactive Ion Beams Programme at Vecc Kolkata, Indian Efforts

BEVATECH has designed and built RFQ-structures between 100 MHz and 325 MHz for various purposes e.g. medical applications, material research, Accelerator Driven Systems (ADS). Our strong expertise lies in building 4-Rod- RFQs. Alternatively we offer other RFQ-structures like 4-vane-, spiral- or IH-RFQs depending on the best fit for your applications.

References:

• HSI RFQ Upgrade for the UNILAC Injection to FAIR
• A CW RFQ Accelerator for Deuterons
• LANSCE H⁺ RFQ Status

The typical frequency range for IH-cavities is between 50 and 250 MHz. IH (Interdigital H-Mode) and CH (Crossbar H-Mode) cavity types have an unprecedented high efficiency compared to other RF structures. We have built and commissioned structures with multiple internal quadrupole triplet lenses.

References:

• The IH Linac of the CERN Lead Injector
• The IH-7-Gap Resonators of the Munich Accelerator for Fission Fragments (MAFF) LINAC
• A Coupled RFQ-IH-DTL Cavity for FRANZ: A Challenge for RF Technology and Beam Dynamics

The typical frequency range for CH-cavities is between 150 and 400 MHz. IH (Interdigital H-Mode) and CH (Crossbar H-Mode) cavity types have an unprecedented high efficiency compared to other RF structures. We offer CH structures up to cw operation and high currents > 100 mA.

References:

• Status and First Measurement Results for a High Gradient CH-Cavity
• Superconducting, energy variable heavy ion linac with constant beta, multicell cavities of CH-type
• Development of superconducting crossbar-H-mode cavities for proton and ion accelerators
• Superconducting CH structure

Re-bunchers fort he medium energy transport between RFQ and DTL s as well as De-bunchers after the DTL section before synchrotron injection can be supplied as spiral bunchers or quarterwave bunchers in various models working in pulsed mode or for cw operation.

References:

• A Rebunching CH Cavity for Intense Proton Beams
• The three-harmonics double-drift buncher at the munich heavy ion postaccelerator

We can provide: Low energy beam transport with electrostatic post-acceleration and solenoidal lenses. Chopping and shaping of ion source beam to change beam characteristics pulse-by-pulse.

MEBT sections with quadrupole magnets, buncher cavity and beam diagnostics are available for protons and heavy ions. Most recently we have worked out the technical design for a MEBT for cw operation.

References:

• MYRRHA Injector Construction

Placing on-line beam diagnostic elements in the right position of a beam line have a strong dependency with the corresponding beam danamics. To aid the selection of the appropriate device and electronics we simulate the expected signals according to beam dynamics.

References:

• Development of an automated BPM test bench
• First optical beam profile measurements on an H⁻-source in Frankfurt
• The HITRAP Decelerator and Beam Instrumentation

RF Amplifiers

RF amplifiers used for accelerators are changing more and more to applications of solid state amplifiers. What SSA technological approach can be used to limit maintenance windows and increase uptime of the acelerator is of key interest. We are providing consulting in system choice and offer 3rd party maintenance for your existing or future system.

References:

• Commissioning of the New Heavy Ion Linac at the NICA Project
• Development of a Range of High-Peak-Power Solid-State-Amplifiers for use in the Heavy Ion LINAC at JINR, Dubna
• High Power Solid-State Amplifiers. New Developments and Technology Comparison

Next to other off-the-shelf codes we use our inhouse code LORASR in development of Linear accelerators. This code has been successfully benchmarked against other commercial available codes and allows next to other beam dynamic approaches the implementation of KONUS beam dynamics. A speciality of BEVATECH to develop cost efficient and powerful accelerators.

References:

• Combined zero degree structure beam dynamics and applications
• Improvements of the LORASR Code and their Impact on Current Beam Dynamics Designs
• Comparison of Different Simulation Codes with UNILAC Measurements for High Beam Currents
• LORASR Code Development
• APF or KONUS Drift Tube Structures for Medical Synchrotron Injectors – A Comparison

Research facilities, medical injectors, power rf galleries, complete accelerator system approaches etc. do always have a conceptual stage in common. We provide concepts, feasibility studies or conduct expert reviews for a 2nd opinion to check the validity of your chosen approach.

References:

• Hadron LINAC with applications in nuclear medicine, materials studies, nuclear physics and instrumentation, fusion and radiobiology (Link to be published)
• New heavy ion injector with beam energies of up to 10 AMeV (Link to be published)

RF Research

RF Research at BEVATECH encompasses not only design of accelerator cavities and high power rf but also extends into EMC research of printed circuits, amplifiers or designing antennas for wireless devices or RFID.

References:

• MAX Project Final Report

On a daily basis we perform simulations using various codes for various RF Research purposes, thermal and mechanical impact analysis, EMC analysis, particle tracking.

References:

• Developing Particle Accelerators with CST (CST EUC 2017, Darmstadt, Germany)
• The general RF tuning for IH-DTL linear accelerators
• KONUS Beam Dynamics Designs Using H-Mode Cavities

Conducting RF simulations, construct or optimise devices and validate the results in measurements is one of our core competences.

References:

• Radio Frequency Power Combiner
• Device and method for ion beam acceleration and electron beam pulse formation and amplification

Maintenance

BEVATECH offers maintenance on selected accelerator- or rf-equipment. Please feel free to get in contact with us about your request.