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50 MW X-BAND RF SYSTEM FOR A PHOTOINJECTOR TEST STATION AT LLNL
In support of X-band photoinjector development efforts at LLNL, a 50 MW test station is being constructed to investigate structure and photocathode optimization for future upgrades. A SLAC XL-4 klystron capable of generating 50 MW, 1.5 microsecond pulses will be the high power RF source for the system. Timing of the laser pulse on the photocathode with the applied RF field places very stringent requirements on phase jitter and drift. To achieve these requirements, the klystron will be powered by a state of the art, solid-state, high voltage modulator. The 50 MW will be divided between the photoinjector and a traveling wave accelerator section. A high power phase shifter is located between the photoinjector and accelerator section to adjust the phasing of the electron bunches with respect to the accelerating field. A variable attenuator is included on the input of the photoinjector. The distribution system including the various x-band components is being designed and constructed. In this paper, we will present the design, layout, and status of the RF system.
Date:
March 11, 2011
Creator:
Marsh, R A; Anderson, S G; Barty, C J; Beer, G K; Cross, R R; Ebbers, C A et al.
Object Type:
Article
System:
The UNT Digital Library
97-ERD-022 final report: Supernova on Nova
This is the final year of the 3-year LDRD-ERD involving Lasers, D&NT, Physics, and ILSA to develope astrophysics experiments on intense lasers such as the Nova and Gekko lasers. During this 3 year period, we have developed a highly successful experiment probing the hydrodynamics of the explosion phase of core-collapse supernovae, which occurs during the first ~3 hours after core collapse. This was in collaboration with the Univ. of Arizona and CEA/Saclay. We also developed a very successful experiment to probe the hydrodynamics of the later time, young remnant phase, meaning the first ~10-20 years after core collapse. This was in collaboration with the Univ. of Michigan and Univ. of Colorado. Finally, we developed during the final year an exquisite experiment to probe the dynamics of radiative, high Mach number astrophysical jets, in collaboration with the Univ. of Maryland and Osaka Univ. Each experiment has received very high visibility, with a multitude of publications, both in the technical journals (most importantly, the astrophysical journals) and in the popular press. The attached publication list shows 25 papers published or submitted to technical journals, 5 articles appearing in the popular press (including a cover story of Sky and Telescope), and 65 conference …
Date:
March 11, 1999
Creator:
Remington, B. A.
Object Type:
Report
System:
The UNT Digital Library
1024 Channel Time-of-Flight Analyzer for MTR Fast Chopper - Operating Manual
Report on the principle of measuring the time-of-flight of neutrons, magnetic-core storage of detector pulses, how pulses are stored, current generator, storage cycle generator, and cathode ray oscillograph.
Date:
March 11, 1959
Creator:
Petree, F. L.
Object Type:
Report
System:
The UNT Digital Library
22X mask cleaning effects on EUV lithography process and lifetime
For this paper, we evaluated the impact of repetitive cleans on a photomask that was fabricated and patterned for extreme ultraviolet lithography exposure. The lithographic performance of the cleaned mask, in terms of process window and line edge roughness, was monitored with the SEMATECH Berkeley micro-exposure tool (MET). Each process measurement of the cleaned mask was compared to a reference mask with the same mask architecture. Both masks were imaged on the same day in order to eliminate any process-related measurement uncertainties. The cleaned mask was periodically monitored with atomic force microscopy (AFM) measurements and pattern widths were monitored using scanning electron microscopy (SEM). In addition, reflectivity changes were also tracked with the aid of witness plate measurements. At the conclusion of this study, the mask under evaluation was cleaned 22 times; with none of the evaluation techniques showing any significant degradation in performance.
Date:
March 11, 2011
Creator:
George, Simi A.; Chen, Robert J.; Baclea-an, Lorie Mae & Naulleau, Patrick P.
Object Type:
Article
System:
The UNT Digital Library
3D Mapping of Polymer Crosslink Density with Magnetic Resonance Imaging
Magnetic Resonance Imaging (MRI) techniques have been used to detect areas of low crosslink density in damaged silicone parts in an effort to develop a QA/QC protocol to be used in the development of new parts. Model materials of varying crosslink density first demonstrated the applicability of the method. Analysis of damaged pads has been shown to be clearly distinguishable by MRI. It is our belief that both the T{sub 2} weighted SPI NMR and the T{sub 2} weighted water/fat suppression MRI experiments can be used to map out the location of different cross-linking densities, ultimately determining the quality or homogeneity in polymers.
Date:
March 11, 2005
Creator:
Herberg, J L; Gjersing, E L; Chinn, S C & Maxwell, R S
Object Type:
Article
System:
The UNT Digital Library
79th Texas Legislature, Regular Session, House Concurrent Resolution 19
Concurrent resolution introduced by the Texas House of Representatives and Senate designating February 28 to March 1, 2005, as Tyler Days at the State Capitol.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 20
Concurrent resolution introduced by the Texas House of Representatives and Senate congratulating J. Lindsey Bradley, Jr., on his receipt of the 2004 Earl M. Collier Award for Distinguished Health Care Administration.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 21
Concurrent resolution introduced by the Texas House of Representatives and Senate congratulating the Red Raiders football team of Robert E. Lee High School in Tyler on winning the state Class 5A Division I football championship.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 28
Concurrent resolution introduced by the Texas House of Representatives and Senate honoring Philip A. Berkebile on his retirement from the Texas Daily Newspaper Association.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 41
Concurrent resolution introduced by the Texas House of Representatives and Senate in memory of Judge Fidencio M. Guerra, Sr.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 47
Concurrent resolution introduced by the Texas House of Representatives and Senate concurrent resolution honoring the life of civil rights leader James Leonard Farmer, Jr.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 60
Concurrent resolution introduced by the Texas House of Representatives and Senate honoring Gail Platt of Lubbock for her 20 years of service to the Texas Community College Teachers Association.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 65
Concurrent resolution introduced by the Texas House of Representatives and Senate designating February 2005 as Black History Month in Texas.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 72
Concurrent resolution introduced by the Texas House of Representatives and Senate designating February 22, 2005, as Panola County Day at the Capitol.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 75
Concurrent resolution introduced by the Texas House of Representatives and Senate congratulating the Kilgore High School football team on winning the 2004 UIL Class 4A Division II State Football Championship.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 76
Concurrent resolution introduced by the Texas House of Representatives and Senate congratulating Miss Texas USA 2005 Tyler Willis of Brownfield.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 79
Concurrent resolution introduced by the Texas House of Representatives and Senate recognizing February 28, 2005, as West Day at the State Capitol.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 80
Concurrent resolution introduced by the Texas House of Representatives and Senate congratulating the Crawford High School Pirates football team on their championship season.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 82
Concurrent resolution introduced by the Texas House of Representatives and Senate congratulating the Crawford High School Band on their contribution to the community.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 83
Concurrent resolution introduced by the Texas House of Representatives and Senate recognizing National Eating Disorders Awareness Week, February 27 through March 5, 2005.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 84
Concurrent resolution introduced by the Texas House of Representatives and Senate designating September 2005 as Leukemia and Lymphoma Awareness Month.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, House Concurrent Resolution 92
Concurrent resolution introduced by the Texas House of Representatives and Senate honoring Verlin Callahan of Cedar Creek for his service to the Independent Cattlemen's Association of Texas and the wider Central Texas community.
Date:
March 11, 2005
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
82nd Texas Legislature, Regular Session, House Concurrent Resolution 70
Concurrent resolution introduced by the Texas House of Representatives and Senate recognizing February 28, 2011, as Texas Southern University Day at the State Capitol.
Date:
March 11, 2011
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
Absorber height effects on SWA restrictions and 'Shadow' LER
None
Date:
March 11, 2011
Creator:
McClinton, Brittany M.; Naulleau, Patrick P. & Wallow, Thomas
Object Type:
Article
System:
The UNT Digital Library