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Parallel strong-strong/strong-weak simulations of beam-beam interaction in hadron accelerators
In this paper, we present a parallel computational tool, BeamBeam3D, developed at Lawrence Berkeley National Laboratory, for strong-strong/strong-weak beam-beam modeling. This tool calculates self-consistently the electromagnetic beam-beam forces for arbitrary distributions during each collision when a strong-strong beam-beam interaction model is used. When a strong-weak model is used, the code has the option of using a Gaussian approximation for the strong beam. BeamBeam3D uses a multiple-slice model, so finite bunch length effects can be studied. The code also includes a Lorentz boost and rotation to treat collisions with finite collision crossing angle. It handles arbitrary closed-orbit separation (static or time dependent) and models long-range beam-beam interactions using a newly developed shifted Green function approach. It can also handle multiple interaction points using externally supplied linear maps between interaction points in the strong-weak model. The code has been used to study beam-beam effects in the RHIC, Tevatron, and LHC. In this paper we will describe the BeamBeam3D code, present example simulations, and describe the code performance.
Date:
September 18, 2003
Creator:
Qiang, Ji; Furman, Miguel; Ryne, Robert D.; Fischer, Wolfram; Sen, Tanaji & Xiao, Meiqin
Object Type:
Article
System:
The UNT Digital Library
The Western Outlook. (San Francisco, Oakland and Los Angeles, Calif.), Vol. 22, No. 13, Ed. 1 Saturday, December 18, 1915
Weekly African-American newspaper published in Oakland, California that includes local, state and national news along with extensive advertising.
Date:
December 18, 1915
Creator:
Francis, Joseph S. & Derrick, J. Lincoln
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 36, No. 491, Ed. 1 Friday, November 18, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
November 18, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 37, No. 335, Ed. 1 Friday, August 18, 2006
Free weekly newspaper that includes business and classified advertising.
Date:
August 18, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 551, Ed. 1 Friday, December 18, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
December 18, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 395, Ed. 1 Friday, September 18, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
September 18, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 287, Ed. 1 Friday, July 18, 2008
Free weekly newspaper that includes business and classified advertising.
Date:
July 18, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Garland News. (Garland, Tex.), Vol. 17, No. 48, Ed. 1 Friday, March 18, 1904
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
March 18, 1904
Creator:
Green, Joe T.
Object Type:
Newspaper
System:
The Portal to Texas History
The Garland News (Garland, Tex.), Vol. 54, No. 3, Ed. 1 Friday, April 18, 1941
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
April 18, 1941
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Garland News. (Garland, Tex.), Vol. 19, No. 19, Ed. 1 Friday, August 18, 1905
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
August 18, 1905
Creator:
Holford, Will A.
Object Type:
Newspaper
System:
The Portal to Texas History
The Garland News (Garland, Tex.), Vol. 54, No. 16, Ed. 1 Friday, July 18, 1941
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
July 18, 1941
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Garland News. (Garland, Tex.), Vol. 17, No. 23, Ed. 1 Friday, September 18, 1903
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
September 18, 1903
Creator:
Cullom, John H.
Object Type:
Newspaper
System:
The Portal to Texas History
The Garland News. (Garland, Tex.), Vol. 17, No. 36, Ed. 1 Friday, December 18, 1903
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
December 18, 1903
Creator:
Cullom, John H.
Object Type:
Newspaper
System:
The Portal to Texas History
Convairiety, Volume 12, Number 5, March 18, 1959
Bimonthly newsletter published for employees of the Convair Division in Fort Worth containing work-related information, updates about employees, and other news.
Date:
March 18, 1959
Creator:
General Dynamics Corporation. Convair Division.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Lectures on the new particles
An attempt is made to discuss systematics of new particles and their spectroscopy in a simple manner. The main emphasis is on charm and SU(4), weak decays of charmed mesons, hadronic masses, and charmonium. (SDF)
Date:
August 18, 1976
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
CDF Run IIb Silicon Vertex Detector DAQ Upgrade
The CDF particle detector operates in the beamline of the Tevatron proton-antiproton collider at Fermilab, Batavia, IL. The Tevatron is expected to undergo luminosity upgrades (Run IIb) in the future, resulting in a higher number of interactions per beam crossing. To operate in this dense radiation environment, an upgrade of CDF's silicon vertex detector (SVX) subsystem and a corresponding upgrade of its VME-based DAQ system has been explored. Prototypes of all the Run IIb SVX DAQ components have been constructed, assembled into a test stand and operated successfully using an adapted version of CDF's network-capable DAQ software. In addition, a PCI-based DAQ system has been developed as a fast and inexpensive tool for silicon detector and DAQ component testing in the production phase. In this paper they present an overview of the Run IIb silicon DAQ upgrade, emphasizing the new features and improvements incorporated into the constituent VME boards, and discuss a PCI-based DAQ system developed to facilitate production tests.
Date:
December 18, 2003
Creator:
al., S. Behari et
Object Type:
Article
System:
The UNT Digital Library
A Fast, Wide-Range Time-to-Height Conversion System
A time-to-height conversion system was developed which is useful for measuring time intervals from 10 psec to 200 mu sec. When driven by a mercury- relay pulse generator through appropriate fixed delays, the resolution of the system, FWHM, is 6 psec, the apparent time shift with temperature is less than 2 psec/ deg C, and the integral linearity is within plus or minus 1%. The apparent time distribution through a type 58 AVP photomultiplier tube driven by a mercury-relay pulser was less than 0.3 nsec at a fixed light level equivalent to 10/sup 3/ photoelectrons per pulse. The apparent time shift was less than 0.5 nsec for variations from 10/sup 2/ to 10/sup 4/ photoelectons per pulse. (auth)
Date:
September 18, 1962
Creator:
Wieber, D. L.
Object Type:
Report
System:
The UNT Digital Library
[Transcript of letter from Jo S. Wallace to Josephus C. Moore, February 7, 1864, forwarded by Charles Moore with addendum to Ziza Moore via Josephus, March 15, 1864]
Transcript of a letter from Jo S. Wallace to J. C. Moore regarding Wallace's difficulty finding an engineering job in California and other news. Charles Moore has written an addendum to the letter and sent it and another letter onward to Ziza Moore and Josephus.
Date:
February 18, 1864
Creator:
Wallace, Jo S. & Moore, Charles B., 1822-1901
Object Type:
Letter
System:
The UNT Digital Library
Oral History Interview with Margaret Gillooly, March 18, 1995
Access:
Use of this item is restricted to the UNT Community
Interview with Margaret Gillooly, a civilian internee of the Japanese in WWII from San Francisco, California. Gillooly discusses her family's move to the Philippines in 1938, schooling, the start of war and the Japanese invasion, staying in Cebu City, her parents' escape from Manila and surviving a sinking in Manila Bay, Japanese occupation of Cebu, being moved to Manila, various experiences surviving internment at Santo Tomas Prison Camp, bombings, the American invasion and liberation, a Japanese counterattack and siege, emotional and mental impacts, and evacuation.
Date:
March 18, 1995
Creator:
Byrd, Richard W. & Gillooly, Margaret
Object Type:
Book
System:
The UNT Digital Library
Kull Shock Propagation Verification on Paved Mesh Geometries
None
Date:
August 18, 2011
Creator:
Cunningham, A J
Object Type:
Report
System:
The UNT Digital Library
Time reversal invariance - a test in free neutron decay
Time reversal invariance violation plays only a small role in the Standard Model, and the existence of a T-violating effect above the predicted level would be an indication of new physics. A sensitive probe of this symmetry in the weak interaction is the measurement of the T-violating ''D''-correlation in the decay of free neutrons. The triple-correlation D{sigma}{sub n}{center_dot}p{sub e} x p{sub v} involves three kinematic variables, the neutron spin, electron momentu, and neutrino (or proton) momentum, and changes sign under time reversal. This experiment detects the decay products of a polarized cold neutron beam with an octagonal array of scintillation and solid-state detectors. Data from first run at NIST's Cold Neutron Research Facility give a D-coefficient of -0.1 {+-} 1.3(stat.) {+-} 0.7(syst) x 10{sup -3}. This measurement has the greatest bearing on extensions to the Standard model that incorporate leptoquarks, although exotic fermion and lift-right symmetric models also allow a D as large as the present limit.
Date:
May 18, 1999
Creator:
Lising, Laura J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Evaluating Use of Satellite Observations for Detecting Large CO2 Leaks and Carbon Sequestration Monitoring
None
Date:
July 18, 2012
Creator:
Brewer, W; Hoffman, G; Silver, E; DiLeonardo, C; Henderson, J R & Vigil, S
Object Type:
Report
System:
The UNT Digital Library
Performance measurements of the DIXI (dilation x-ray imager) photocathode using a laser produced x-ray source
None
Date:
July 18, 2012
Creator:
Nagel, S R; Ayers, M J; Felker, B; Smith, R F; Bell, P M; Bradley, D K et al.
Object Type:
Article
System:
The UNT Digital Library
Picosecond Bunch Length and Energy-Z Correlation Measurements at Slac's A-Line and End Station A
None
Date:
June 18, 2007
Creator:
Molloy, S.; Emma, P.; Frisch, J.; Iverson, R.; McCormick, D.; Woods, M. et al.
Object Type:
Article
System:
The UNT Digital Library