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New trends in electron
accelerators development
Zbigniew Zimek
Centre for Radiation Research and Technology
Institute of Nuclear Chemistry and Technology
Dorodna 16, 03-195 Warsaw, Poland
PlasTEP seminar: „New trends in application of modern electron beam generation in air pollution”
Warsaw, 14 01 12 2014
INTRODUCTION
PROGRESS IN INDUSTRIAL ACCELERATORS DEVELOPMENT - Adaptation of the accelerators primary built for
scientific experiments; - Electron energy and beam power increase in certain
accelerators constructions; - Accelerators for R&D, pilot plants and industrial
facilities; - Computer control system for accelerator start up, full
operation and technological process management; - Reliability improvement according to industrial
standards; - Accelerator technology perfection (electrical efficiency,
cost); - Accelerators for MW power beam level; - Compact and more efficient accelerator constructions; - Very low energy, powerfull accelerators.
Penetration [g/cm2] = 0.37(Energy [MeV]-0.2) for one side treatment and equal entrance and exit doses
Productivity [kg/h] =
3600 x Power [kW] x
Utilization efficiency
/Dose [kGy]
Average beam power
Electron energy
Although there are many different types of accelerators offering a wide range of performances ratings, only few would be suitable for particular application (Marshall R. Cleland, 1992).
Criterions of accelerators selection Criterion of selection Fundamental accelerator parameters Electron energy Average beam power Terms of accelerator purchase Price Producer Terms of delivery and installation Warranty conditions Exploitation cost Auxiliary accelerator parameters Scan performances Auxiliary parameters Measure and control Main components and systems Accelerator external supply service
Remarks The basic requirements which define technological abilities and facility productivity Economical aspects of accelerator purchase which define investment and exploitation costs; period of time needed for facility completion Auxiliary parameters which may characterize accelerator quality and provide necessary data for facility design
Facility general assumptions Irradiation zone dimensions and arrangement, Process throughput, Operation schedule, Seasonal requirements, Vertical or horizontal beam direction, Reliability of the accelerator (availability), Remote accelerator operation, Factory assembling test and commissioning
conditions, Warranty conditions, Post warranty service, Staff training, Facility certification (equipment, safety, personnel).
Radiation process effectiveness Acceptable price of 1 W electron
beam power
Type of radiation process
Product characteristics
100-250 $/W Semiconductors modification
Low dose
Small scale
High unit price
100-50 $/W Radiation sterilization
Medium dose
Large scale
Medium unit price
<2.5 $/W Flue gas treatment
Low dose
Very large scale
No commercial value
Accelerators for radiation processing
Direct accelerator Single cavity Linear accelerator
HV cable from Coaxial cable from Waveguide from
DC power supply RF generator source of microwaves
Accelerators for radiation processing (achievements)
Accelerator
type
Parameter
Direct
DC
RF
100 - 200
MHz
Linear
microwaves
1.3–9.3 GHz
Av. beam
current
Energy range
Beam power
Electrical
efficiency
<1.5 A
0.05 – 5
MeV
~500 kW
60 – 80 %
<100 mA
0.3 – 10
MeV
700 kW
20 – 50 %
<100 mA
2 – 10 MeV
100 kW
10 – 20 %
DIRECT ACCELERATORS transformer type
List of transformer accelerator producers PCT Prod. & Mfg., LLC, formerly RPC Industries, USA
ESI - Energy Science, USA
RDI - Radiation Dynamics, USA (IBA)
Wasik Associates, USA
AEB Inc., USA (closed down),
NHV - Nissin High Voltage, Japan
SHI - Sumitomo Heavy Industries, Japan
Electron Crosslinking AB, Sweden
High Voltage Engineering Europe, Netherlands
BINP - Institute of Nuclear Physic, Russia
SIEA - Sci. Inst. of Electrophysical Apparatus, Russia
Vivirad, France
Res. Inst. of Automation for Machine-Building, China
Inst. of Nuclear Studies, Establishment for Nuclear Equipment, Poland
EB TECH Co., Ltd., Korea – BINP collaboration
Capability of D.C. Power Supply for transformer accelerators
Accelerator Power line
transformer
Cockckroft-
Walton
HF
Transformer
Dynamitron
Ratings 150-1000kV
10-1000 mA
300-5000 kV
30-1000 mA
500-1000 kV
30 mA
500-5000 kV
1-70 mA
Frequency 50/60 Hz 1-3 kHz 20-50 kHz 50-100 kHz
Insulation Oil/SF6 SF6 SF6 SF6
Efficiency >90 % 70-80 % 85 % 30-60 %
Remarks Low energy
High power
High energy
High power
Large
High energy
Low power
Compact
High energy
Low eff.
Voltage 50-75 kV Beam power 8-50 W
USHIO / AIT
Miniature Electron Beam Tube Min-EB
14
27 cm 3
3 c
m
Advanced Electron Beam Inc. emitter module
15
Window Support Grid
Heated Filaments
41 cm x 6.3 cm beam window
21 cm diameter module 79 cm overall length
AEB Inc. emitter development
Window Support Grid
AEB Inc. LOW ENERGY ELECTRON MODULE
AEB Inc. Emitter Module
18
Advanced Electron Beams Inc. had been a maker of electron emitter equipment for sterilization of packaging and other applications, which aim to use less energy and other resources than conventional approaches.
AEB Inc. was founded in 1999 supported by 50 M$ and closed down in 2012.
"It was a really innovative, transformative technology that had lots of applications",
"It just was too hard to take the science and industrialize the science”,
„Technology just proved to be too difficult to commercialize„.
Zbigniew ZIMEK, INCT, Warsaw, Poland 19
Energy 200 keV Power 700 W
Current 3,5 mA Scanning up to 20cm
AC power 10 kVA Size 40x40x80 cm
Acclerating section
Beam scanner
STERSTAR
Linac Technologies
Facility for surface sterilization
Zbigniew ZIMEK, INCT, Warsaw, Poland 20
Low energy „in line” facility for surface sterilization
Electron energy 200 keV Beam power 1 kW Accelerator dimension: 0.45x0.7x1.10 m Unit dimension: 75x200x250 cm
Manufacturer: IBA
Low energy accelerators for
surface treatment
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CASCADE ACCELERATOR
HV electrode
Generator Isolator
Safety rings
Motor
Gun Section
Multiplier
Prressure tank
Efficiency 67% Goal: 2 MeV; 200 kW
23
ELV 12 coreless transformer accelerator
Electron energy 1 MeV Beam power 400 kW Frequency 1000 Hz One power supply Three scanners
BINP, Russia
HV electron accelerator Electron-25
1 MeV; 500 kW
1 – pressure tank, 2 – focusing coil, 3 – scanning magnet, 4 – scanner, 5 – output foil.
Mobile accelerator systems
SINGLE CAVITY ACCELERATORS single pass or multi-pass systems
RF accelerator producers (100 - 200 MHz)
INP - Institute of Nuclear Physic, Russia
IBA - Ion Beam Application, Belgium
Denki Kogyo Co, Japan
KAPRA – Research Association, Korea
ILU 6 ELECTRON ACCELERATOR INP, Russia
Energy 1,2-2,5 MeV Beam power 20 kW Frequency 127 MHz
Scanner
Resonator
1 – vacuum tank, 2 – copper toroidal cavity, 3 – magnetic lens, 4 – ion pumps, 5 – grid-cathode unit, 6 – outlet device, 7– coupling loop support, 8 – vacuum
capacitor, 9 – RF generators.
ILU 10 accelerator 5 MeV, 60 kW
ILU-10
Energy 5 MeV
Beam power 50 kW
ILU 12 ELECTRON ACCELERATOR
Electron energy: 5 MeV Beam power: 100/300 kW Frequency: 176 MHz RF power: 450 kW
Auslender V.L. et all., EPAC 2002, Paris, France
32
ILU 12
ILU 14
Variant 1 2
Generator tube 5xGI-50A 5xGI-50A
Energy, MeV 10 7.5
Beam power, kW 100 100
Accelerating structure efficiency, % 61 77
Total efficiency, % 26 32
ILU 14
10 MeV ELECTRON ACCELERATOR
RHODOTRON TYPE
1. Resonator 2. Tetrod 3. Water cooling system 4. Support 5. Electromagnet 6. Vacuum pump
Frequency 107.5 MHz
TT 1000: do 700 kW; 7 MeV (100 mA) do 500 kW; 5 MeV (100 mA) TT 300: do 200 kW; 10 MeV (20 mA) do 135 kW; 5 MeV (27 mA) TT 200: do 100 kW; 10 MeV (10 mA) do 100 kW; 5 MeV (20 mA) TT 100 35 kW; 10 MeV (3.5 mA)
Rhodotron TT 300, IBA, USA
Electron energy: 5-7 MeV Beam power: 200 kW
NFI; Japan: Irradiation Room with EB and X-ray Ports
IBA Rhodotron 5 MeV; 500 kW
(X-ray)
38
Accelerator type FANTRON-I
Electron energy 10 MeV Beam power 100 kW Frequency 159 MHz Efficiency 45 %
70 cm
H-j. Kwon i inni, EPAC, 2000 M-j.Park i inni, EPAC, 2000
LINEAR ELECTRON ACCELERATORS
Linear electron accelerator producers (microwaves 1.3-9.3 GHz)
Varian, USA L-3 Communicationsm, PSD, USA RPC Technologies, USA American Science & Engineering, Inc., USA Mitsubishi Heavy Industries, Japan Mevex, Canada Technical Systems Ltd, UK Thomson CSF, France Res. Inst. of Electrophysical Apparatus, Russia RIA TORYI, Russia Res. Inst. of Automation for Machine-Building, China Inst. of Nuclear Studies, Establishment for Nuclear
Equipment, Poland
41
Res. Inst. of Electrophysical Apparatus, Russia
Parameters
MODEL
UEL-10-
10S UEL-8-5S
UEL-3-
2.5S UEL-3-1S
RF Energy
Source
Klystron
KIU-147A
Magnetron
MI-262
Klystron
KIU-168
Magnetron
M5193
Working
frequency,
MHz
2856 3200 2856 2998
Energy, MeV 10 8 3 3
Beam power,
kW 10 5 2.5 1
Pulse
repetition 300 500 360 300
42
Accelerator UEL-10-10S; 10 MeV, 10 kW
43
Standing wave linear accelerators L3 Communication (SureBeam), USA
Energy/beam
power
Frequency RF
source
Energy
source
Switch
5 MeV/15 kW S Klistron PFN Tyratron
10 MeV/18 kW S Klistron PFN Tyratron
5 MeV/150 kW L Klistron Indukc. IGCT
10MeV/150kW L Klistron Indukc. IGCT
44
Sterilization facility
Energy 3 MeV Beam power 3 kW Scanning 50 cm Height 1 m Width 0,3 m Manufacturer: LINAC TECHNOLOGIES
STERBOX
46
SterStar™ in-line electron beam surface sterilization uses 3 KeVAC low-energy accelerators, 200 keV energy beam, to sterilize the product surface only. SterBox™ in-line electron beam sterilization tunnel uses 1 or 2 MeVAC medium-energy accelerators, each producing a 3 MeV, 4 MeV or 5 MeV energy beam. This unit provides complete sterilization of single-use medical devices or pharmaceutical products. Beam energy and materials handling systems are customized for the product to be sterilized. SterRoom™ e-beam sterilization system contains one or two high-energy high power CIRCE accelerators with a 10 MeV 20 kW beam, suitable for production plants or service centers. LINAX™ x-ray generator is an OEM product with a 4 MeV to 10 MeV accelerator. It is used by integrators for imaging of trucks and containers, and testing of large industrial parts.
GETINGE LINAC
47
LINEAR ELECTRON ACCELERATOR Mitsubishi Heavy Industries Ltd.
Electron energy 4 MeV; Length 60 cm; Weight 20 kg
48
American Science & Engineering, Inc.
Energy 4 MeV; X-band 9303 MHz; control interface PLC; Acceleration section RF length 40 cm
49
Continous way (cw) electron accelerator Beam current 50 mA Electron energy 0,6 MeV Beam power 30 kW Length 0,8 m Frequency 2,45 GHz Efficiency 40 %
A.S. Alimov i inni, 2000
Beam energy: 1.2 MeV Beam current: 0 to 50 mA Maximum beam power: 60 kW Length: 1.3 m Gun/klystron HV 15 kV Power consumption: ~150 kW Electrical efficiency: ~40%
SINP MSU 60 KW, 1.2 MEV COMPACT CW LINAC FOR RADIATION TECHNOLOGIES
51
High freqency sources
Klystron Pulse power Average
power
Frequency Efficiency
TH 2158 5 MW 45 kW 2856 MHz 48 %
TH 2104 5 MW 250 kW 1300 MHz 45 %
TH 2089 cw 1100 kW 352 MHz 62 %
TH 2158
TH2104
TH 2089
52
OUTPUT AND BEAM SCANNING DEVICES
1 2 3 4 5
A. B.
Different configuration of accelerator output device (A – triangular scanning, B – parallel beam): 1 – electron beam; 2 – scanning magnet, 3 –
scanner; 4 – correction electromagnet; 5 – output foil
54
BEAM SCANNING ILU 6
1, 3 – Vacuum system; 2, 4 – Scanning and switching magnet; 5 – Exit window; 6 – Irradiated cables or wires
Double beam path scanning horn
Golubenko Y. et all., INP 97-7, Russia
DOUBLE SIDE BEAM SCANNER (IBA)
DOUBLE SIDE BEAM SCANNER
58
ELECTRON-10 (0.5-0.75 MeV; 50 kW) 1 – Primary winding; 2 – Secondary winding; 3 – Pressure vessel; 4 – Electron source; 5 – Accelerating tube; 6 – Scanning device; 7 – Vacuum pump; 8 – Vacuum chamber; 9 – Outlet window; 10 – Turning magnet; 11 – Radiation shielding.
A.S. Ivanov, V.P. Ovchinnikov, M.P. Svinin, N.G. Tolstun, PAC 1993, Washington, USA
59
LINEAR SCANNING SYSTEM
CAARI 2002 Denton, Texas November 13, 2002
VACUUM CHAMBER
ELECTRON BEAM
ELECTROMAGNET TITANIUM
FOIL
60
ECONOMIC ASPECTS OF ACCELERATOR IMPLEMENTATION
Producer
(accelerator type)
Energy
[MeV]
Beam
[mA]
Power
[kW]
Price
[M$]
Price
[$/W]
IBA, Belgium (UHF) 10 15 150 6.1 40.7
RDI, U.S.A. (DC) 5 50 250 4.9 19.6
NHV, Japan (DC) 5 30 150 5.0 33.3
Vivirad,France(DC) 5 200 1000 4.4 4.4
INP, Russia (UHF) 5 10 50 1.2 24.0
NIIEFA,Russia (DC) 1 500 500 1,9 3.8
INP, Russia (DC) 1 400 400 2.0 5.0
61
Remarks Characteristics steps can be recognized in the past of
accelerator development. Present stage of accelerator technology perfection includes: cost effectiveness, reliability, compactness, very low energy and introduction of MW beam power level,
Major industrial accelerator producers are located in USA, Russia, Japan and Belgium. Several other countries including China and Poland are capable to produce accelerators on limited scale,
Any practical accelerator construction must be compromise between size, efficiency and cost,
The progress in accelerator technology is not a quick process but can be easily noticed in longer time scale,
Appropriate accelerator selection should be performed to meet all technical and economical conditions for successful process implementation,
62
Highly trained personnel is not required to run modern accelerators because of simplicity of their operation under computer support,
Accelerator reliability is very important for any industrial facility. Life time of certain accelerator components should be extended to meet industrial standards,
Spare parts and major maintenance service are usually available from the manufacturer of the accelerator,
High frequency accelerators are more costly to operate due to their more complex construction and much more expensive spare parts like klystrons and magnetrons,
New accelerators constructions can frequently offer better economic and technical characteristics but only long time operation can revile weak points of certain accelerator construction in practical industrial conditions.