Low voltage multi-beam klystron amplifies with periodic permanent magnet focusing system with field reverses

KIU-168 KU-399А

Klystron KIU-111 KIU-168 KIU-147 KIU-147A KU-399A KU-399Operating frequency, MHz 2450±5 2856±5 2450±5 2856±5 2450±5 2450±5

Output pulsed power, MW 6 6 5 6 - -Average output power, kW 6 6 25 25 50 25Efficiency, % 45 45 45 45 65 55Amplification, dB 50 50 50 50 42 40Cathode voltage, kV 50 52 50 53 15 10

Weight with PMFS, kg 80 80 85 87 40 36

● The low cathode voltage (2-3 times lower as compared with single beam analogs), no isolating oil ● Compact low weight permanent magnet focusing system, which is integral part of the device, no solenoid● High electrical and thermal margin of safety of the klystron output window.● Operating in any spatial position● Operating in the moving state

FSUE “R & P Corp. “Toriy”, Russia

RF driver

●Generator with synthesizer or amplifier●Output pulse power up to 200W●Average power up to 2W●Pulse long up to 30 µs●Two variants of RF source: with operating frequency 2450 MHz and 2856 MHz●Weight is not more 7 kg.

Chemical Kinetics and Combustion, SB RAS, Russia

• Beam energy up to 16 MeV• Average beam current up to 100 mA• Weight is 1100 kg.

Linear electron accelerator UEL-15-100D

The klystron KIU-111 is used in this accelerator as an RF amplifier terminal stage with automatic control system tuning RF driver frequency to accelerating structure resonance frequency. Klystron is isolated from accelerating structure by circulator.

STC LUTs at D.V. Efremov Scientific Research Institute of Electrophysical Apparatus, Russia

A compact rugged 70 MeV race-track microtron

● Beam energy 15-70 MeV● Beam current 5-10 mA● Rare-earth end magnets● Narrow rectangular biperiodic accelerating structure with RF quadrupole focusing

The klystron KIU-147A operating in self-oscillation mode without a precision RF generator, a circulator, frequency and temperature stabilization systems.

World Physics Technologies Inc. USA

(1) mobile source of bremsstrahlung radiation for search of buried explosive materials and narcotics;

(2) production of isotopes for positron emission tomography;

(3) cancer radiation therapy; (4) substance elemental analysis; (5) injector to synchrotrons and

storage rings; (6) free electron laser driver; (7) nuclear physics research and

other

• Beam energy 1.2 MeV• Average power 60 kW• Accelerator wall-plug efficiency up to 40%

A compact continuous wave electron accelerator

Two phased klystrons KU-399A operating in self-oscillation mode without a precision RF generator, a circulator, frequency and temperature stabilization systems

Skobeltsyn Institute of Nuclear Physics MSU, Russia with World Physics Technologies Inc. USA

Radiation technologies in industry

A compact light source MIRRORCLE-20 (6X)

● The classical microtron, which is used as an injector to the storage ring● Microtron beam energy 20 (6) MeV● Microtron beam current 100 mA● Storage ring diameter 30 cm

The microtron is fed by pulsed KIU 111 klystron while for feeding a synchrotron cavity CW klystron KU-399 phased with microtron klystron is used.

Photon Production Laboratory, Ltd., Japan

Prospective directions for development of the high power pulsed and CW MBK for accelerators.

Klystron 1 2 3

Operating frequency, MHz 5712±5 9300±5 5712±5

Output pulsed power, MW 5 2.5 -

Average output power, kW 5 3 15

Cathode voltage, kV 50 40 9

Cathode pulsed current, A 250 130 -

Average cathode current, A 0.25 0.16 3.5

Number of beam 40 30 12

Efficiency, % 45 45 55

Amplification, dB 45 45 40

Weight with PPMFS, kg 70 45 30

Number of focusing field direction reverses 1 1 1

MBK for feeding multi-section superconducting linear accelerators

• Output power is regulated within 9 – 15 kW by changing the beams current with constant cathode voltage.• Klystron efficiency stays close to 70% when output RF power is varied from 15 to 9 kW and current is varied

from 2.6 to 1.7 A.• Cathode voltage 7 kV• Cathode current 2.7 A• Cathode current emission density less then 2 А/сm

Klystron design is close to the design of KU-399, it has 18 beams and uses magnetic system and collector of KU-399 klystron.