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Antiproton Acceleration In The Fermilab Main Injector Using 25 Mhz H
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Book Synopsis Antiproton Acceleration in the Fermilab Main Injector Using 2.5 MHz (H by :
Download or read book Antiproton Acceleration in the Fermilab Main Injector Using 2.5 MHz (H written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: During the Run II era at Fermilab, the Recycler stores antiprotons at 8 GeV and the Main Injector accelerates the antiprotons and the protons from 8 GeV to 150 GeV for Tevatron injection. The Recycler injects antiprotons to the Main Injector in 2.5 MHz rf buckets. This report presents an acceleration scheme for the antiprotons that involves a slow ramp with initial 2.5 MHz acceleration and subsequent fast acceleration with 53 MHz rf system. Beam acceleration and rf manipulation with space charge and beam loading effects are simulated using the longitudinal simulation code ESME. Simulation suggests that one can expect about 15% emittance growth for the entire acceleration cycle with beam loading compensations. Preliminary experimental results with proton beam will also be presented.
Book Synopsis Experimental Test of a New Antiproton Acceleration Scheme in the Fermilab Main Injector by :
Download or read book Experimental Test of a New Antiproton Acceleration Scheme in the Fermilab Main Injector written by and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an effort to provide higher intensity and lower emittance antiproton beam to the Tevatron collider for high luminosity operation, a new Main Injector (MI) antiproton acceleration scheme has been developed [1-4]. In this scheme, beam is accelerated from 8 to 27 GeV using the 2.5 MHz rf system and from 27 to 150 GeV using the 53 MHz rf system. This paper reports the experimental results of beam study. Simulation results are reported in a different PAC'05 paper [5]. Experiments are conducted with proton beam from the Booster. Acceleration efficiency, emittance growth and beam harmonic transfer between 2.5 MHz (h=28) and 53 MHz (h=588) buckets have been studied. Beam study shows that one can achieve an overall acceleration efficiency of about 100%, longitudinal emittance growth less than 20% and negligible transverse emittance growth. accelerated to 150 GeV and injected to the Tevatron. The multi-bunch coalescing process is eliminated in this acceleration scheme. Consequently, longitudinal emittance growth is reduced. Smaller emittance growth reduces beam loss.
Book Synopsis Antiproton Acceleration in the Main Injector with RF at Harmonic Number H by :
Download or read book Antiproton Acceleration in the Main Injector with RF at Harmonic Number H written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Antiproton bunches of 1.5 eVs are required for the Tevatron but can not be accelerated through transition in the Main Injector (MI) with the h=588 rf system. Chandra Bhat has developed parameters for h=28 acceleration from 8 GeV followed by h=588 acceleration from 25 to 150 GeV.[1] This note refines the h=28 scenario and also adapts it to the h=84 case needed for 132 ns separation. It is practicable to accelerate the 1.5 eVs {bar p} bunches in about seven seconds with no loss and less than ten percent emittance growth using the existing 2.5 MHz cavities. Both the cycle time and emittance growth are significantly improved by the scheme described in this note. Excellent results can be obtained for the 7.5 MHz case with only 75 kV except that there is a 0.5 % beam loss. For completely clean 53 MHz capture of the tail produced by shape mismatch at transition, 250 kV is desirable for bunch rotation at 26 GeV.
Book Synopsis Antiproton Acceleration in the Fermilab Main Ring and Tevatron by :
Download or read book Antiproton Acceleration in the Fermilab Main Ring and Tevatron written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The operation of the Fermilab Main Ring and Tevatron rf systems for colliding beams physics is discussed. The changes in the rf feedback system required for the accelration of antiprotons, and the methods for achieving proper transfer of both protons and antiprotons are described. Data on acceleration and transfer efficiencies are presented.
Book Synopsis Status of the Fermilab Main Injector by :
Download or read book Status of the Fermilab Main Injector written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fermilab Main Injector is a rapid cycling proton synchrotron. It is designed to accelerate protons and antiprotons to 150GeV. The initial commissioning phase was in the summer of 1999. Since then, Main Injector has been supporting the high energy physics program at Fermilab. Beam studies for continued improvements in machine performance are in progress, in order to support a luminosity of 8*1031 cm−2 sec−1 during Run IIa. The status of the Main Injector and beam studies results are presented.
Book Synopsis Fermilab Antiproton Source, Recycler Ring and Main Injector by :
Download or read book Fermilab Antiproton Source, Recycler Ring and Main Injector written by and published by . This book was released on 2013 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cycle-to-cycle Extraction Synchronization of the Fermilab Booster for Multiple Batch Injection to the Main Injector by : S. Kopp
Download or read book Cycle-to-cycle Extraction Synchronization of the Fermilab Booster for Multiple Batch Injection to the Main Injector written by S. Kopp and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a system to ensure cycle-to-cycle synchronization of beam extraction from the Fermilab Booster accelerator to the Main Injector. Such synchronization is necessary for multiple batch operation of the Main Injector for the Run II upgrade of anti-proton production using slip-stacking in the Main Injector, and for the NuMI (Neutrinos at the Main Injector) neutrino beam. To perform this task a system of fast measurements and feedback controls the longitudinal progress of the Booster beam throughout its acceleration period by manipulation of the transverse position maintained by the LLRF (Low-level Radio Frequency) system.
Book Synopsis Synchronization of the Fermilab Booster and Main Injector for Multiple Batch Injection by :
Download or read book Synchronization of the Fermilab Booster and Main Injector for Multiple Batch Injection written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To date, the 120 GeV Fermilab Main Injector accelerator has accelerated a single batch of protons from the 8 GeV rapid-cycling Booster synchrotron for production of antiprotons for Run II. In the future, the Main Injector must accelerate 6 or more Booster batches simultaneously; the first will be extracted to the antiproton source, while the remaining are extracted for the NuMI/MINOS (Neutrinos at the Main Injector/Main Injector Neutrino Oscillation Search) neutrino experiment. Performing this multi-batch operation while avoiding unacceptable radioactivation of the beamlines requires a previously unnecessary synchronization between the accelerators. We describe a mechanism and present results of advancing or retarding the longitudinal progress of the Booster beam by active feedback radial manipulation of the beam during the acceleration period.
Book Synopsis Double Intensity Injection for Antiproton Production by :
Download or read book Double Intensity Injection for Antiproton Production written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A way to increase the luminosity of the Fermilab Tevatron during Run IIa [1] is to increase the number protons delivered to the target for antiproton production. In Ref. [2], a method to inject continuously 12 booster batches into the Main Injector is described in detail. The injection will fill 6/7 of the Main Injector with double intensity, for both antiproton production and the Numi neutrino project in Run IIb [3]. In this paper, they address the special case of filling only one booster-batch length of the Main Injector with double intensity in Run IIa. The problem we are facing is to limit the length of the final proton batch to within a booster-batch length, which is the circumferential length of the antiproton accumulator. Otherwise, losses will occur either at the Main Injector or the antiproton production area. With reasonable sizes of the barrier waves, simulations show that they are able to restrict the double-density protons to 5.9% longer than the booster-batch length before adiabatic capture. After adiabatic capture with 53-MHz rf, 90 buckets are occupied. The protons in the extra 6 buckets at the sides will be lost eventually. However, these amount to only 0.51% of the total proton batch. Some injection parameters of the Main Injector are listed in a table.
Book Synopsis A New Antiproton Beam Transfer Scheme Without Coalescing by :
Download or read book A New Antiproton Beam Transfer Scheme Without Coalescing written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An effective way to increase the luminosity in the Fermilab Tevatron collider program Run2 is to improve the overall antiproton transfer efficiency. During antiproton coalescing in the Main Injector (MI), about 10-15% particles get lost. This loss could be avoided in a new antiproton transfer scheme that removes coalescing from the process. Moreover, this scheme would also eliminate emittance dilution due to coalescing. This scheme uses a 2.5 MHz RF system to transfer antiprotons from the Accumulator to the Main Injector. It is then followed by a bunch rotation in the MI to shorten the bunch length so that it can be captured by a 53 MHz RF bucket. Calculations and ESME simulations show that this scheme works. No new hardware is needed to implement this scheme.
Book Synopsis Chromaticity Control in the Fermilab Main Injector by :
Download or read book Chromaticity Control in the Fermilab Main Injector written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chromaticity control in the Fermilab Main Injector will be important both in accelerating protons and antiprotons from 8 GeV to 150 GeV (or 120 GeV) and in decelerating recycled 150 GeV antiprotons to 8 GeV for storage in the Recycler Ring. The Main Injector has two families of sextupoles to control the chromaticity. In addition to the natural chromaticity, they must correct for sextupole fields from ramp-rate-dependent eddy currents in the dipole beampipes and current-dependent sextupole fields in the dipole magnets. The horizontal sextupole family is required to operate in a bipolar mode below the transition energy of 20 GeV. We describe methods used to control chromaticities in the Fermilab Main Injector. Emphasis is given to the software implementation of the operator interface to the front-end ramp controllers. Results of chromaticity measurements and their comparison with the design model will be presented.
Book Synopsis Proposal to Construct an Anti-Proton Source for the Fermilab Accelerator by :
Download or read book Proposal to Construct an Anti-Proton Source for the Fermilab Accelerator written by and published by . This book was released on 1976 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: We propose to build a small storage ring for the accumulation of antiprotons produced in an external target. Stochastic and electron cooling will be used to reduce the transverse and longitudinal phase space of the antiprotons. The dynamics of stochastic and electron cooling will also be studied in this storage ring using circulating protons. The cooled antiprotons can be re-injected into the main ring or energy doubler ring; after simultaneous acceleration along with a proton bunch the accelerator will become a colliding {bar}pp machine with a center of mass energy range of 300-2600 GeV. Luminosities in the range 1029-1032 cm −2sec{-1} are expected.
Download or read book The Fermilab Main Injector written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fermilab has proposed the construction of a new 150 GeV accelerator called the Main Injector. This accelerator will replace the existing Main Ring in all its functions. The Main Injector is expected to perform at a significantly higher level than the Main Ring as measured either in protons delivered per cycle, protons delivered per second, or transmission efficiency. It is anticipated that following construction of this machine the antiproton production rate at Fermilab will exceed 1 x 1011 /bar p//hour and that a luminosity in excess of 5 /times/ 1031 cm/sup -1/ will be supported in the existing collider. Additional benefits accruing from this accelerator include reduction of backgrounds at the collider detectors, potential development of a third interaction region in the Tevatron, and the availability of slow extracted 120 GeV beams year around. Design criteria and parameters of the Main Injector will be discussed. 1 fig., 3 tabs.
Book Synopsis RF Superconductivity by : Hasan Padamsee
Download or read book RF Superconductivity written by Hasan Padamsee and published by John Wiley & Sons. This book was released on 2009-03-30 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second book to RF Superconducting, written by one of the leading experts. The book provides fast and up-to-date access to the latest advances in the key technology for future accelerators. Experts as well as newcomers to the field will benefit from the discussion of progress in the basic science, technology as well as recent and forthcoming applications. Researchers in accelerator physics will also find much that is relevant to their discipline.
Book Synopsis Antiproton Accumulator in the Main Injector Era by :
Download or read book Antiproton Accumulator in the Main Injector Era written by and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: I propose a new lattice for Fermilab Antiproton Accumulator. The lattice is designed with the aim of implementing higher bandwidth stochastic cooling systems, thus enabling the Accumulator to handle antiproton beam intensities expected in the Main Injector era. The design proposed here satisfies very well all the requirements for the new Accumulator concerning the lattice functions, stochastic cooling parameters, and the tunability of the machine.
Book Synopsis The Fermilab Antiproton Source Design Report April, 1981 by :
Download or read book The Fermilab Antiproton Source Design Report April, 1981 written by and published by . This book was released on 1981 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the Fermilab Antiproton source is to provide at least $10^$ cooled, accumulated antiprotons for acceleration in the Main Ring and Tevatron for colliding-beams experiments with 1-TeV protons. This will provide the highest available energy in the world for particle-physics experiments through at least the 1980's. Collisions at 2 TeV in the center of mass will provide a unique experimental tool in a new energy range. The design of the Antiproton Source has been carried out by the Colliding Beams Department of the Accelerator Division in collaboration with Argonne National Laborator.y, Lawrence Berkeley Laboratory, the Institute of Nuclear Physics at Novosibirsk, and the University of Wisconsin ...
Book Synopsis A Transitionless Lattice for the Fermilab Main Injector by :
Download or read book A Transitionless Lattice for the Fermilab Main Injector written by and published by . This book was released on 1991 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Medium energy (1 to 30 GeV) accelerators are often confronted with transition crossing during acceleration. A lattice without transition is presented, which is a design for the Fermilab Main Injector. The main properties of this lattice are that the [gamma]{sub t} is an imaginary number, the maxima of the dispersion function are small, and two long-straight section with zero dispersion. 7 refs., 5 figs.
