Download T_Johns_-_CPI_Klystron

X Band Vacuum Devices
Presented by: Tony Johns,
CPI Europe, Surrey, England
Tel: +44 (1932) 256 935 Fax: +44 (1932) 241 271
Mobile: +44 (7880) 507 913 Email: [email protected]
With material from: Adam Balkcum, Steve Lenci, Mike Cusick, Peter Kolda
CPI, Palo Alto, California, USA
Historical Timeline
1935:
Eimac Division
founded as Eitel
McCullough, Inc.
1930
1940
1948:
CPI is originated as
founding technology
group of Varian
Associates
1954:
CMP Division is
established in
Canada
1950
1965:
Eitel-McCullough
merges with Varian
Associates to form
Eimac Division
1960
1959:
Varian Associates
acquires Bomac
Labs in Beverly,
MA.
1970
1980
1971:
Varian integrates
SFD Labs of
Union, NJ with
Beverly MA,
division renamed
BMD
1990:
Eimac awarded an
Emmy for
technological
achievement
Klystrode IOT
1990
2001
1995:
Leonard Green &
Partners, L.P.
purchases entire
Electron Devices
Business from
Varian and
forms CPI
2001:
Current
management
team takes
leadership
2004
2006
2004:
Cypress
Group
Acquires
CPI
CPI
Acquires
Econco
Broadcast
Service
2007:
CPI
acquires
Malibu
Research
Associates
2007
2006:
CPI stock
publicly
trades NASDAQ:
“CPII"
MPP &
Eimac
divisions
consolidate
Communications & Power Industries Inc.
Publicly held
NASDAQ: “CPII"
Established in August 1995
Worldwide Sales and Service Organization
1,700 Employees Worldwide
Six autonomous business units:
BMD
CMP
Econco
MPP
Satcom
Beverly, MA, U.S.A.
Georgetown, ONT, Canada
Woodland, CA, U.S.A.
Palo Alto, CA, U.S.A
Georgetown, ONT, Canada (Manufacturing)
Palo Alto, CA, U.S.A (R&D, Marketing, Service)
Malibu Research Associates, Camarillo, CA, U.S.A.
2
Manufacturing/R&D Locations
Communications & Medical Products Division
—Manufacturing Operation
Georgetown,
Ontario, Canada
Woodland,
California
Beverly, MA
Palo Alto, California
—R&D, Marketing, Service
Beverly Microwave Products Division
Camarillo, CA
Malibu Research Associates
CPI Specialities
High Power
High Efficiency
Broad Product Offering
Consultative Engineering Services
Products Supplied
Klystrons
Gyrotrons
Helix TWTs
Coupled Cavity TWTs
Ring Bar TWTs
Power Grid Tubes
Inductive Output Tubes
Magnetrons
Cross-Field Amplifiers
X-Ray Generators
Satellite
Communications
amplifiers
Antennas
Helix X Band Products
VTX6389G5
Typical Operating Parameters
Frequency
Power Output CW
Efficiency
Beam Voltage
Beam Current
8.15
2.5
59
15
1
GHz
kW
%
kV
A
VKL-8301 Multiple Beam Klystron
Typical Operating Parameters
Frequency
Peak Power Output
Ave. Power Output
Power Asymmetry
Efficiency
Beam Voltage
Beam Current
Microperveance
RF Pulse Length
Saturated Gain
Cathode loading
1.3
10
150
0.7
59
120
141
3.4
1.5
49
2.2
GHz
MW
kW
%
%
kV
A
ms
dB
A/cm2
Used in European X-Ray FEL at DESY. Potential use in ILC.
Horizontal version in progress with integrated X-ray
shielding and cart currently in test.
VKL-9130 IOT
Typical Operating Parameters
Frequency
Peak Power
Beam Voltage
Beam Current
Bandwidth (-1 dB)
Gain
Efficiency
1.3
90
42
3.4
2
20
60
GHz
kW
kV
A
MHz
dB
%
Recent testing successful at FZD
Currently developing 120 kW CW device
VKX-7864B Klystron
250 kW CW in X-Band
Typical Operating Parameters
Power Output
Beam Voltage 51
Beam Current
Supply Power
Efficiency
Frequency
1dB Bandwidth
Saturated Gain
Cavities
Cooling Method
250
kV
11.05
564
44
8.560
60
45
6
liquid
kW
A
kW
%
GHz
MHz
dB
VTX-5681 Coupled Cavity TWT
100 kW Pulsed in X-band
Typical Operating Parameters
Frequency
Peak Power Output
Duty
Saturated Gain
Bandwidth (-1 dB )
Beam Voltage
Beam Current
10
100
35
49
1
45
11
GHz
kW
%
dB
GHz
kV
A
VKX-7841 Klystron
Typical Operating Parameters
Frequency
Peak Power Output
Ave. Power Output
Saturated Gain
Bandwidth (-1 dB )
Efficiency
Beam Voltage
Beam Current
9.5
650
0.2
71
45
28
8
30
GHz
kW
kW
dB
MHz
%
kV
A
Used in experimental accelerator
research circa 1980, 5 were
made. Very compact.
Recent Advancements
Market drivers
Requirements for higher efficiency
Desire for lower beam voltages
Need for smaller size
CPI Response
Sheet Beam Klystron
PPM Focused Klystron
VKX-7993 Klystron
2.7 MW Pulsed
Typical Operating Parameters
Frequency
Peak Power
Peak Power (goal)
Saturated Gain
Bandwidth (-1 dB )
Efficiency
Beam Voltage
Beam Current
9.3
2.7
5.5
52
65
43
120
52
GHz
MW
kW
dB
MHz
%
kV
A
Compact device, recently in production
VKX-8293A Sheet Beam Klystron
Sheet Beam Technology
Typical Operating Parameters
Frequency
Peak Power Output
Ave. Power Output
Saturated Gain 42
Efficiency
Beam Voltage
Beam Current
9.35
2.7
0.3
dB
25
76
144
GHz
MW
kW
%
kV
A
Sheet Beam Klystron
Sheet Beam Formation
Drift Tunnel
Cathode
Focus
Electrode
Anode
VKX-8293A Sheet Beam Klystron
Beam transmission was 63% for above
parameters.
Best transmission was 94% at a much lower
operating voltage.
Cathode position will be adjusted to improve
transmission.
Conclusions
X band frequency range fertile
Efficiency continues to improve, over 60%
Size of products shrinking
Modern design codes allow complex analysis
of beam dynamics
New RF structures possible
Power outputs from hundreds of watts to
tens of megawatts
Attracting new engineers into vacuum device
field