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2 MW upgrade of the Fermilab Main Injector
In January 2002, the Fermilab Director initiated a design study for a high average power, modest energy proton facility. An intensity upgrade to Fermilab's 120-GeV Main Injector (MI) represents an attractive concept for such a facility, which would leverage existing beam lines and experimental areas and would greatly enhance physics opportunities at Fermilab and in the U.S. With a Proton Driver replacing the present Booster, the beam intensity of the MI is expected to be increased by a factor of five. Accompanied by a shorter cycle, the beam power would reach 2 MW. This would make the MI a more powerful machine than the SNS or the J-PARC. Moreover, the high beam energy (120 GeV) and tunable energy range (8-120 GeV) would make it a unique high power proton facility. The upgrade study has been completed and published. This paper gives a summary report.
Date:
June 4, 2003
Creator:
Chou, Weiren
Object Type:
Article
System:
The UNT Digital Library
An 8-GeV Synchrotron-Based Proton Driver
In January 2002, the Fermilab Director initiated a design study for a high average power, modest energy proton facility. Such a facility is a possible candidate for a construction project in the U.S. starting in the middle of this decade. The key technical element is a new machine, dubbed the ''Proton Driver,'' as a replacement of the present Booster. The study of an 8-GeV synchrotron-based proton driver has been completed and published. This paper will give a summary report, including machine layout and performance, optics, beam dynamics issues, technical systems design, civil construction, cost estimate and schedule.
Date:
June 4, 2003
Creator:
Chou, Weiren
Object Type:
Article
System:
The UNT Digital Library
9/11 Commission Recommendations: Implementation Status
From Introduction: "This report provides a review of the 9/11 Commission recommendations and the status of their implementation at the end of the 109th Congress. The discussions herein are organized on the basis of policy themes that are core of the 9/11 Commission's recommendations, rather than a review of every numbered item set out in the Commission's final report."
Date:
December 4, 2006
Creator:
Grimmett, Richard F.
Object Type:
Report
System:
The UNT Digital Library
A 14.6 Arcsecond Quasar Lens Split by a Massive Dark Matter Halo
Gravitational lensing is a powerful tool to study the distribution of dark matter in the universe. The cold dark matter model of structure formation predicts the existence of quasars gravitationally lensed by concentrations of dark matter so massive that the quasar images would be split by over 7 inches. However, numerous searches for large-separation lensed quasars have been unsuccessful; all of the roughly 70 lensed quasars known to date, such as Q0957+561, have smaller splittings, and can be explained in terms of galaxy scale concentrations of baryonic matter that have undergone dissipative collapse. Here they report the discovery of the first large-separation lensed quasar, SDSS J1004+4112, with a maximum separation of 14.62 inches; at this separation, the lensing object must be dominated by dark matter. While gravitationally lensed galaxies of even large separation are known, large-separation quasars are more useful cosmological probes because of the simplicity of the resulting lens systems. The discovery in their current quasar sample is fully consistent with the theoretical expectations based on the cold dark matter model.
Date:
December 4, 2003
Creator:
Inada, N.; Oguri, M.; Pindor, B.; Hennawi, J.; Chiu, K.; Zheng, W. et al.
Object Type:
Article
System:
The UNT Digital Library
911 Call Center Legislation: S. 1250 and H.R. 2898
This article discusses the 2003 Congress bipartisan E911 (Enhanced 911) legislation introduced in both chambers. Moreover, the article describes the difference in parallel provisions each bill contains that have significant implications for emergency communication policy. The article defines Enhanced 911 as the capability of identifying the phone number and location of a call to a PSAP (Public Safety Answering Points). This report characterizes the cost to PSAPs of upgrading systems and supporting expanded operations as an obstacle to this legislation.
Date:
August 4, 2004
Creator:
Moore, Linda K.
Object Type:
Report
System:
The UNT Digital Library
1500 MHZ Passive SRF Cavity for Bunch Lengthening in the NSLS-II Storage Ring
NSLS-II is a new ultra-bright 3 GeV 3rd generation synchrotron radiation light source. The performance goals require operation with a beam current of 500mA and a bunch current of at least 0.5mA. Ion clearing gaps are required to suppress ion effects on the beam. The natural bunch length of 3mm is planned to be lengthened by means of a third harmonic cavity in order to increase the Touschek limited lifetime. After an extensive investigation of different cavity geometries, a passive, superconducting two-cell cavity has been selected for prototyping. The cavity is HOM damped with ferrite absorbers on the beam pipes. The two-cell cavity simplifies the tuner design, compared to having two independent cells. Tradeoffs between the damping of the higher order modes, thermal isolation associated with the large beam tubes, and overall cavity length are described. A copper prototype has been constructed, and measurements of fundamental and higher order modes will be compared to calculated values.
Date:
May 4, 2009
Creator:
Yanagisawa,T.; Rose, J.; Grimm, T. & Bogle, A.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 29, No. 16, Ed. 1 Friday, February 4, 2000
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 4, 2000
Creator:
Steele, Janet
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 30, No. 26, Ed. 1 Friday, May 4, 2001
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
May 4, 2001
Creator:
Baldwin, Alisha
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 32, No. 6, Ed. 1 Friday, October 4, 2002
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 4, 2002
Creator:
Baldwin, Alisha
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 32, No. 23, Ed. 1 Friday, April 4, 2003
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 4, 2003
Creator:
Baldwin, Alisha
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 34, No. 15, Ed. 1 Friday, February 4, 2005
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 4, 2005
Creator:
Delaney, Darcy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 34, No. 18, Ed. 1 Friday, March 4, 2005
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 4, 2005
Creator:
Delaney, Darcy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 35, No. 10, Ed. 1 Friday, November 4, 2005
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 4, 2005
Creator:
Waltman, Erin
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 36, No. 26, Ed. 1 Friday, May 4, 2007
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
May 4, 2007
Creator:
Ray, Johnna
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 37, No. 23, Ed. 1 Friday, April 4, 2008
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 4, 2008
Creator:
Pace, Joshua
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 39, No. 3, Ed. 1 Friday, September 4, 2009
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
September 4, 2009
Creator:
Price, Racheal
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 39, No. 13, Ed. 1 Friday, December 4, 2009
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
December 4, 2009
Creator:
Price, Racheal
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
1891 Colorado County Courthouse Chairs
Photograph of three side chairs in the district courtroom in the 1891 Colorado County courtroom in down town Columbus, Texas.
Date:
November 4, 2009
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1891 Colorado County Courthouse Interior
Photograph of four wooden chairs sitting against a low wooden gate inside of the Colorado County courthouse.
Date:
November 4, 2009
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1891 Colorado County Courthouse Interior Ceiling
Photograph of the ceiling in the district courtroom in the 1891 Colorado County courthouse in downtown Columbus, Texas. A light fixture hangs down in front of a window.
Date:
November 4, 2009
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1891 Colorado County Courthouse Restoration
Photograph of repaired and repainted windows on the north side of the second floor of the 1891 Colorado County Courthouse restoration project. The window and walls are covered with metal scaffolding.
Date:
November 4, 2009
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1891 Colorado County Courthouse Restoration
Photograph of a double window on the north side of the first floor that has been repaired and repainted for the 1891 Colorado Courthouse Restoration Project.
Date:
November 4, 2009
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1891 Colorado County Courthouse Restoration
Photograph of restoration in progress on the 1891 Colorado County courthouse in downtown Columbus, Texas. The view is of the north side of the courthouse facing U.S. Highway 90. Scaffolding covers the stone building.
Date:
November 4, 2009
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
1891 Colorado County Courthouse Restoration
Photograph of a construction crane operating on the northwest courthouse lawn. The crane is lifting bundles of tiles to the roof level.
Date:
November 4, 2009
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History