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ABSTRACT: The sweeping system deflects high-energy proton and antiproton
beams in a single-turn rotating-field magnet that combines deflection in
both planes into a single unit. The magnet current has a peak amplitude
of 10 kA and the sweep rime is 1.6 μs. At the Fermilab Antiproton
Source increasing proton beam intensities incident on the antiproton
production target threaten to damage the target. The purpose of the
sweep magnet is to spread the hot spot on the target with a sweep radius
of up to 0.5 mm, greatly reducing the peak energy deposition
Particle Accelerator Conference, 1999. Proceedings of the 1999; 02/1999
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ABSTRACT: INTRODUCTION can achieve a flux of 136 gauss in that gap. To develop the required kick, a magnetic length of 2.5 meters is required. To achieve a reasonable rise time, three 83.3 cm long kicker magnets are used. The inductance as calculated from aperture dimensions is 598 nH. The field propagation time through the magnet can be calculated from the inductance and the characteristic impedance as: In order to maximize the efficiency of the injection process into the Main Injector Ring, the beam gap required for the extraction and injection kickers can be reduced. A switching magnet which will achieve full field within 1% on the order of 30 to 40 nSec is required to achieve efficient transfers of beam between Booster and the MIR with the removal of only one bunch from the Booster ring. The magnet designed to perform this task is a 25W traveling wave device which reaches its full field of 136 Gauss in 30 nSec. The field is developed across an apertu
04/1998;
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ABSTRACT: This paper will describe the design, construction and testing of the new kicker magnet along with the associated spark gap pulsers, pulse forming lines and trigger circuits. Difficulties and our solutions will also be presented.
04/1998;
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ABSTRACT: Intensity of the incident 120-GeV proton beam on the antiproton
production target is scheduled to increase to 5×10<sup>12</sup>
protons per pulse. To prevent damage to the target, we plan to spread
the hot spot on target with a beam sweeping system. Now under
development are rotating-field magnets for installation upstream and
downstream of the target. These magnets will deflect the beam in a
circular pattern on the target. Peak current of 7 kA and peak voltage
drop of 6 kV are expected. The power supply, which is separated from the
magnet by a distance of about 10 m, utilizes magnetic pulse compression
by saturating inductors to drive the magnets through the long
transmission lines
Particle Accelerator Conference, 1997. Proceedings of the 1997; 06/1997
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ABSTRACT: There are six proton and six antiproton bunches used at the
present time for Tevatron Collider operation. As the luminosity is
increased for a fixed number of bunches, the number of interactions per
bunch crossing increases. The quality of the physics data taken by the
CDF and DO detectors is enhanced by reducing the number of interactions
per bunch crossing. To this end it is planned to collide 36 proton
bunches with 36 anti-proton bunches. To do this, it is necessary to
construct and install a new 150 GeV injection kicker system with a
faster rise and fall time than the existing injection kickers. This
paper will describe the design, construction and testing of the new
kicker magnet along with the associated spark gap pulsers, pulse forming
lines and trigger circuits. Difficulties and our solutions are also
presented
Particle Accelerator Conference, 1995., Proceedings of the 1995; 06/1995
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Pulsed Power Conference, 1993. Digest of Technical Papers. Ninth IEEE International; 07/1993
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ABSTRACT: As part of the Fermilab Tevatron upgrade, a 6.25 Ω ferrite
loaded traveling wave kicker magnet has been designed. The critical
parameters are the field rise time and flatness during and after the
pulse. A picture frame pole piece configuration was chosen which
requires two pulses of equal amplitude but opposite polarity. Low
inductance, high voltage capacitors placed between each of the pole
pieces provide the shunt reactance necessary to achieve the 6.25 Ω
impedance. Cross coupling adjacent cells is used to improve the
transient response of the magnet. The compensated termination resistors
are built into the magnet to minimize reflections. Two spark gap pulsers
provide the two 4800 A fast rise time current pulses necessary to drive
this magnet. The field in this 2.4 m long magnet rises to 1055 G in less
than 400 ns. This paper describes the design choices involved with this
system and preliminary test results
Particle Accelerator Conference, 1993., Proceedings of the 1993; 06/1993
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ABSTRACT: A system for antiproton beam transfer from the Main ring to the Energy Saver for colliding beam operations has been designed and fabricated. The system is similar to the existing proton beam transfer system used for fixed target operation of the Energy Saver. Using a fast kicker in the Main Ring, one or several bunches of 150 GeV pbars will be kicked horizontally across the septa of two Lambertsons into a short transfer line. At the end of this line, they are injected into the Energy Saver through two more Lambertsons and kicked onto a closed orbit by a second fast kicker. For commissioning and tune-up, the system will be operated in reverse, extracting 150 GeV protons from the Energy Saver to the Main Ring. In addition to a description of the design of the system and its components, the status of the installation and commissioning will also be discussed.
IEEE Transactions on Nuclear Science 11/1985; · 1.45 Impact Factor
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ABSTRACT: The design, fabrication, and commissioning of the extraction and beam transport systems required for pbar production for the FNAL Antiproton Source will be described. The extraction system utilizes a fast kicker and Lambertson septum magnets to extract in a single turn one booster batch of 120 GeV protons from the FNAL Main Ring. The extracted beam is transported a distance of 174 m by a beam transport system consisting of 12 dipoles and 14 quadrupoles. The last 8 quadrupoles are configured as 4 pairs which focus the beam to a small round spot (radius 0.4 mm) on a pbar production target. The extraction channel is also designed to inject 8 GeV cooled pbars from the Accumulator Ring into the Main Ring, or extract 8 GeV protons from the Main Ring for diagnostic and tune-up work in the Antiproton Source beam lines and rings.
IEEE Transactions on Nuclear Science 11/1985; · 1.45 Impact Factor
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ABSTRACT: In the past two years a number of changes have been made to the Main Ring Magnet Power Supply System to improve current regulation and long term drift. Some of the modifications discussed include new computers, new passive filters, direct analog feedback, a voltage-to-frequency converter for bend bus regulation, and a "smart" Nuclear Magnetic Resonance probe. Among the improvements to be described are the attenuation of power supply ripple by a factor of five and the reduction of long term flattop drift by an order of magnitude.
IEEE Transactions on Nuclear Science 07/1981; · 1.45 Impact Factor
