By Topic

# Abstracts. International Vacuum Electronics Conference 2000 (Cat. No.00EX392)

## Filter Results

Displaying Results 1 - 25 of 183
• ### Abstracts. International Vacuum Electronics Conference 2000 (Cat. No.00EX392)

Publication Year: 2000
| | PDF (885 KB)

• ### The future of klystrons

Publication Year: 2000
Cited by:  Papers (1)
| | PDF (35 KB)

Summary form only given, as follows. The klystron is the oldest of the microwave tubes, but continues to be essential to a number of user communities, principally that of experimental physics, which was also responsible for its invention. The advent of traveling-wave tubes and of the transistor has limited the uses of the klystron to applications requiring a high pf/sup 2/ product. For those appli... View full abstract»

• ### Development of a high-power klystron for the Spallation Neutron Source

Publication Year: 2000
Cited by:  Papers (1)
| | PDF (93 KB)

Summary form only given. The Spallation Neutron Source (SNS) will provide an intense beam of neutrons for scattering experiments. The SNS will be comprised of an ion source, a 1 GeV H/sup -/ linear accelerator, an accumulator ring, a target for neutron production, and an area for the scattering experiments. It is anticipated that anywhere from 36 high-power klystrons up to 160 lower-power klystron... View full abstract»

• ### Recent progress in CW and long-pulse klystrons at CPI

Publication Year: 2000
| | PDF (253 KB)

The need for long-pulse and super-power CW klystrons for particle accelerators has been growing.. The key requirements for these devices are high efficiency and reliability. The authors describe the features of four klystons produced for particle accelerators. View full abstract»

• ### Permanent magnet focused, multi-stage depressed collector klystron amplifiers for satellite communications

Publication Year: 2000
Cited by:  Papers (2)
| | PDF (261 KB)

A new line of high-efficiency multi-stage depressed collector (MSDC) klystron amplifiers has been developed by Communications and Power Industries Microwave Power Products (CPI/MPP) for use in satellite communications and scientific applications market. These klystrons are air-cooled with permanent magnet focusing. The first products are designed to service the satellite uplink and terrestrial rep... View full abstract»

• ### The klystrino: a high power W-band amplifier

Publication Year: 2000
Cited by:  Papers (3)
| | PDF (268 KB)

High average power millimeter wave sources are being developed in a collaboration between SLAC and CPI. CPI has developed a number of high-power, broadband, millimeter-wave, CCTWT amplifiers. The coupled cavity technology is now approaching the limits for generating power at millimeter wave frequencies. To generate significant increases in power, other technologies need to be considered. At SLAC, ... View full abstract»

• ### Crossed-field devices: where are we and options for the future

Publication Year: 2000
| | PDF (40 KB)

Summary form only given, as follows. The industry sale of vacuum electron devices worldwide during 1999 was approximately $488M. The share of this in the crossed-field device (CFD) industry was about$105M, or 21%. The US industry sale of vacuum electron devices during the same time was around $251M with approximately$34M, or 14%, in the CFD industry. There are currently two dominant manufacturer... View full abstract»

• ### Development and production of the SFD-268 CFA for the Aegis AN/SPY-1D(V) radar

Publication Year: 2000
| | PDF (174 KB)

The SFD-268 is a high duty, low noise, low jitter version of the CFA used in the AN/SPY-1 radar. It has been developed in a cooperative effort with NSWC Crane. The objective of this program was to increase CFA performance while maintaining the same form, fit, function, and life as the previous version of this CFA, known as the SFD-262. This paper describes the design improvements and development p... View full abstract»

• ### The structure of noise in crossed-field amplifiers

Publication Year: 2000
| | PDF (152 KB)

Summary form only given, as follows. The results of a series of detailed tests on a pulsed forward wave CFA show that its noise output is highly structured in the frequency domain. The noise structure results from the CFA acting as a delay-line oscillator while it is amplifying the normal drive signal. The CFA oscillations occur at frequencies that are multiples of the reciprocal group delay throu... View full abstract»

• ### Cold cathodes for CFAs

Publication Year: 2000
| | PDF (71 KB)

Summary form only given. Application of cold cathode technology for use in crossed-field amplifiers (CFAs) has been limited by the characteristics of the materials, usually platinum (Pt) or beryllium (Be/BeO), used as the emitter. A case in point is the L-4717, used as the second stage amplifier (baby Amplitron) in the SPS-48-C/E transmitters. This tube, which uses a thermionic emitter, is charact... View full abstract»

• ### A new way reduce control electrode current in DC operated CFAs

Publication Year: 2000
| | PDF (115 KB)

This paper describes a new method to reduce control electrode (CE) current in DC operated CFAs. The method-which has a patent pending-involves the introduction of an auxiliary electrode behind the traditional CE. When the gap between the cathode and CE is properly designed, current in the rotating hub of the CFA can be diverted into this gap and collected on the auxiliary electrode-which is at ano... View full abstract»

• ### Development of ultra-linear traveling wave tubes for telecommunications applications

Publication Year: 2000
| | PDF (100 KB)

Traveling wave tubes (TWT) intended for telecommunications applications are increasingly required to have high linearity, good intermodulation performance, and high power levels; especially for use as modern multi-carrier power amplifiers (MCPA) and in systems that use digital signal encryption. The linearity of the TWT is greatly improved by optimization of the taper of the helix circuit to reduc... View full abstract»

• ### A high power TWT for military satcom

Publication Year: 2000
| | PDF (153 KB)

In 1994, a contract was received for the Heavy Terminal, (HT), Program. The award was from the U.S. Army / Harris Corporation to build a 2 1/4 kW X-band helix vacuum electron device (VED), to be used in a military satellite communications terminal. The VED needed to be of an air-cooled variety. The contract was awarded as a result of competing with other suppliers of VEDs and successfully qualifyi... View full abstract»

• ### 45 GHz TWT-recent advancements

Publication Year: 2000
Cited by:  Papers (5)
| | PDF (58 KB)

Summary form only given, as follows. The latest advancements at Hughes Electron Dynamics regarding the development of 45 GHz traveling wave tubes (TWTs) are presented. The major topics are higher power operation, backward wave suppression, thermal management, and related design issues. TWT performance is shown. These TWTs are designed to produce in excess of 120 watts of CW RF power across the fre... View full abstract»

• ### 94 GHz TWT for military radar applications

Publication Year: 2000
| | PDF (126 KB)

Summary form only given, as follows. For future military radar applications high frequency, light weight TWTs become more and more important. To cover this market, TTE (Thomson Tubes Electroniques) started the development of a 94 GHz TWT. The goal of this program was a TWT (double comb delay line structure) in the 94 GHz frequency range with an instantaneous bandwidth greater 500 MHz (tunable with... View full abstract»

• ### Wide bandwidth, high average power EIKs drive new radar concepts

Publication Year: 2000
Cited by:  Papers (4)
| | PDF (169 KB)

Millimeter wave radar and communications capability can be significantly enhanced using improvements to the extended interaction klystron (EIK). This presentation describes the performance resulting from various programs undertaken at CPI (Communications & Power Industries) to increase the bandwidth and power capability of the EIK. This presentation describes the design simulation and correspondin... View full abstract»

• ### Experience and application of high power RF sources at the Frascati Laboratory particle accelerator DA/spl Phi/NE

Publication Year: 2000
| | PDF (258 KB)

After a brief description of the particle accelerators at Frascati National Laboratory, the paper discusses the use of klystrons as power sources. View full abstract»

• ### 700 MHz HOM-IOT: design and first test results

Publication Year: 2000
Cited by:  Papers (2)
| | PDF (105 KB)

IOTs (inductive output tubes) are relatively novel vacuum electron devices that have established their position as reliable and highly efficient UHF amplifiers, predominantly in the television transmitter service. In this application, they reach output power levels equivalent to about 50 kW CW. Scientific applications, like proton accelerators, require UHF amplifiers with considerably higher outpu... View full abstract»

• ### Performance characteristics of an MSDC IOT amplifier

Publication Year: 2000
| | PDF (145 KB)

CPI EIMAC has provided inductive output tube (IOT) amplifier systems for the television broadcast market since 1988. The key performance advantage IOT amplifiers achieve over other high power UHF amplifier technologies are superior DC to RF power conversion efficiency. Efforts continue to further improve the power conversion efficiency of IOT amplifiers by employing multi-staged depressed collecto... View full abstract»

• ### Ka-band klystron amplifiers for satellite communications and scientific applications

Publication Year: 2000
Cited by:  Papers (3)
| | PDF (139 KB)

A new line of Ka-band klystron amplifiers is under development at the Microwave Power Products Division of Communications and Power Industries, Inc. (CPI/MPP), for use in industrial and scientific applications, as well as satellite communications. These amplifiers are air-cooled, permanent magnet focused and will be both fixed (VKA-7934A) and channel tuned (VKA-7934T). A detailed description of bo... View full abstract»

• ### An extended interaction oscillator based on a complex resonant structure

Publication Year: 2000
| | PDF (143 KB)

Efficiency enhancement was experimentally demonstrated for a Ku-band extended interaction oscillator which features a five-gap interaction cavity with a coaxial section placed between the first and second gaps for ballistic bunching of electrons. Oscillation power of 2.2 kW at 30% electronic efficiency and 41% total efficiency with a depressed collector was achieved. View full abstract»

• ### Three dimensional simulation of cross-field devices and amplifiers

Publication Year: 2000
| | PDF (170 KB)

Used the electromagnetic-PIC simulation code MAGIC3D to perform simulations on several cross-field devices. These include an industrial heating magnetron, a high-power rising sun magnetron, the superpower Amplitron, and the baby Amplitron. The purpose of this research effort was to develop simulation procedures and techniques that give good qualitative and quantitative measurements of the performa... View full abstract»

• ### A time-domain MTL model of the AEGIS CFA circuit for use in the MASK simulation program

Publication Year: 2000
Cited by:  Papers (1)
| | PDF (120 KB)

A time-domain Multiconductor Transmission Line (MTL/sup 2/) model of the stub-supported helix circuit used in the AEGIS CFA has been developed. The stub-supported helix circuit is also commonly employed by emitting sole CFAs operating in S, C, and X frequency bands-so the model has broad applicability. Currently, the circuit model used in MASK is a lumped element /spl pi/ network-first used for CF... View full abstract»

• ### Transient and steady state phase similarity of the AEGIS AN/SPY-1 crossed-field amplifier (CFA) as a function of duty cycle

Publication Year: 2000
| | PDF (69 KB)

The CFA duty cycle value controls the heating and cooling of the anode vanes, leading to thermal expansion and contraction, and thereby impacting the phase characteristic of the device. CFA phase similarity with respect to duty changes are therefore important for CFAs that are installed in radar systems that use rapid duty cycle changes. Because the AEGIS AN/SPY-1 Radar System operates using rapid... View full abstract»

• ### Recent improvements in injection locked magnetrons

Publication Year: 2000
Cited by:  Papers (1)
| | PDF (131 KB)

CPI-Beverly Microwave Division has been engaged in a program to improve the performance of injection locked magnetrons used in a missile seeker application. The principal objectives of this program were: increasing magnetron reliability by decreasing power density inside the device; increasing device lifetime, and ruggedizing device for use in high vibration environments. The injection locked magn... View full abstract»