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A Drive Laser for Multi-Bunch Photoinjector Operation (open access)

A Drive Laser for Multi-Bunch Photoinjector Operation

Numerous electron beam applications would benefit from increased average current without sacrificing beam brightness. Work is underway at LLNL to investigate the performance of X-band photoinjectors that would generate electron bunches at a rate matching the RF drive frequency, i.e. one bunch per RF cycle. A critical part of this effort involves development of photo-cathode drive laser technology. Here we present a new laser architecture that can generate pulse trains at repetition rates up to several GHz. This compact, fiber-based system is driven directly by the accelerator RF and so is inherently synchronized with the accelerating fields, and scales readily over a wide range of drive frequencies (L-band through X-band). The system will be required to produce 0.5 {mu}J, {approx}200 fs rise time, spatially and temporally shaped UV pulses designed to optimize the electron beam brightness. Presented is the current status of this system, producing 2 ps pulses from a continuous-wave source.
Date: May 11, 2012
Creator: Gibson, D J; Cormier, E; Messerly, M J; Prantil, M A & Barty, C J
Object Type: Article
System: The UNT Digital Library
A Linac Simulation Code for Macro-particles Tracking and Steering Algorithm Implementation (open access)

A Linac Simulation Code for Macro-particles Tracking and Steering Algorithm Implementation

None
Date: May 11, 2012
Creator: Sun, Yipeng
Object Type: Report
System: The UNT Digital Library
LHC Abort Gap Cleaning Studies During Luminosity Operation (open access)

LHC Abort Gap Cleaning Studies During Luminosity Operation

The presence of significant intensities of un-bunched beam is a potentially serious issue in the LHC. Procedures using damper kickers for cleaning both the Abort Gap (AG) and the buckets targeted for injection, are currently in operation at flat bottom. Recent observations of relatively high population of the AG during physics runs brought up the need for AG cleaning during luminosity operation. In this paper the results of experimental studies performed in October 2011 are presented.
Date: May 11, 2012
Creator: Gianfelice-Wendt, E.; Bartmann, W.; Boccardi, A.; Bracco, C.; Bravin, E.; Goddard, B. et al.
Object Type: Article
System: The UNT Digital Library
Dynamically Adjustable Wind Turbine Blades (open access)

Dynamically Adjustable Wind Turbine Blades

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program to develop wind turbines with more efficient control systems (project title "Adaptive Turbine Blades: Blown Wing Technology for Low-Cost Wind Power") including critical needs, innovation and advantages, impacts, and contract information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: Caitin Inc.
Object Type: Text
System: The UNT Digital Library
Optimization of Extinction Efficiency in the 8-GeV Mu2e Beam Line (open access)

Optimization of Extinction Efficiency in the 8-GeV Mu2e Beam Line

A muon-to-electron conversion experiment at Fermilab, Mu2e, is being designed to probe for new physics beyond the standard model at mass scales up to 10{sup 4} TeV. For this experiment, the advance in experimental sensitivity will be four orders of magnitude when compared to existing data on charged lepton flavor violation. The muon beam will be produced by delivering a proton beam contained in short 100-ns bunches onto a muon production target, with an inter-bunch separation of about 1700 ns. A critical requirement of the experiment is to ensure a low level of background at the muon detector consistent with the required sensitivity. To meet the sensitivity requirement, protons that reach the target between bunches must be suppressed by an enormous factor, so that an extinction factor, defined as a number of background protons between main bunches per proton in such a bunch, should not exceed 10{sup -9}. This paper describes the advanced beam optics and results of numerical modeling with STRUCT and MARS codes for a beam line with a collimation system that allows us to achieve the experimental extinction factor of one per billion.
Date: May 11, 2012
Creator: Rakhno, I. L.; Drozhdin, A. I.; Johnstone, C.; Mokhov, N. V. & Prebys, E.
Object Type: Article
System: The UNT Digital Library
Fuel From Algae (open access)

Fuel From Algae

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program to efficiently separate micro-solids from water (project title "Scaling and Commercialization of Algae Harvesting Technologies") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: Algaeventure Systems
Object Type: Text
System: The UNT Digital Library
Engineering Enzymes in Energy Crops (open access)

Engineering Enzymes in Energy Crops

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program to engineer plants to produce enzymes that will reduce costs in the production of biofuel (project title "Conditionally Activated Enzymes Expressed in Cellulosic Energy Crops") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: Agrivdia
Object Type: Text
System: The UNT Digital Library
Transformational Energy Technologies (open access)

Transformational Energy Technologies

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program for revolutionary energy technologies including innovation needs and potential impacts. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: United States. Advanced Research Projects Agency-Energy.
Object Type: Text
System: The UNT Digital Library
TRANSPORT THROUGH CRACKED CONCRETE: LITERATURE REVIEW (open access)

TRANSPORT THROUGH CRACKED CONCRETE: LITERATURE REVIEW

Concrete containment structures and cement-based fills and waste forms are used at the Savannah River Site to enhance the performance of shallow land disposal systems designed for containment of low-level radioactive waste. Understanding and measuring transport through cracked concrete is important for describing the initial condition of radioactive waste containment structures at the Savannah River Site (SRS) and for predicting performance of these structures over time. This report transmits the results of a literature review on transport through cracked concrete which was performed by Professor Jason Weiss, Purdue University per SRR0000678 (RFP-RQ00001029-WY). This review complements the NRC-sponsored literature review and assessment of factors relevant to performance of grouted systems for radioactive waste disposal. This review was performed by The Center for Nuclear Waste Regulatory Analyses, San Antonio, TX, and The University of Aberdeen, Aberdeen Scotland and was focused on tank closure. The objective of the literature review on transport through cracked concrete was to identify information in the open literature which can be applied to SRS transport models for cementitious containment structures, fills, and waste forms. In addition, the literature review was intended to: (1) Provide a framework for describing and classifying cracks in containment structures and cementitious materials used …
Date: May 11, 2012
Creator: Langton, C.
Object Type: Report
System: The UNT Digital Library
Affordable Hydrogen Fuel Cell Vehicles (open access)

Affordable Hydrogen Fuel Cell Vehicles

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program for hydrogen fuel cell vehicles (project title "Quaternary Phosphonium Based Hydroxide Exchange Membranes") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: Unviersity of Delaware
Object Type: Text
System: The UNT Digital Library
Ammothermal Growth of GaN Substrates For LEDs (open access)

Ammothermal Growth of GaN Substrates For LEDs

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program to develop less expensive, more efficient LEDs (project title "High-Pressure Ammonothermal Process for Bulk Gallium Nitride Crystal Growth for Energy Efficient Commercially Competitive Lighting") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: Soraa, Inc.
Object Type: Text
System: The UNT Digital Library
Efficient Solar Concentrators (open access)

Efficient Solar Concentrators

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program for an efficient solar tracking device to generate power through a liquid prism panel (project title "Optofluidic Solar Concentrators") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: Teledyne Scientific & Imaging
Object Type: Text
System: The UNT Digital Library
Biofuels from Pyrolysis (open access)

Biofuels from Pyrolysis

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program for a pyrolysis process to generate biofuels (project title "Catalytic Biocrude Production in a Novel, Short-Contact Time Reactor") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: Research Triangle Institute
Object Type: Text
System: The UNT Digital Library
Airborne Wind Turbine (open access)

Airborne Wind Turbine

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program for more efficient and cheaper wind energy (project title "Airborne Wind Turbine") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: Makani Power Inc.
Object Type: Text
System: The UNT Digital Library
Biofuel from Bacteria and Sunlight (open access)

Biofuel from Bacteria and Sunlight

Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program to generate liquid fuels from solar energy using photosynthetic microorganisms (project title "Shewanella as an Ideal Platform for Producing Hydrocarbons") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date: May 11, 2012
Creator: University of Minnesota
Object Type: Text
System: The UNT Digital Library
Oral History Interview with Lincoln Grahlfs, May 11, 2012 transcript

Oral History Interview with Lincoln Grahlfs, May 11, 2012

The National Museum of the Pacific War presents an oral interview with Lincoln Grahlfs. Grahlfs joined the Navy in October 1942 after working at Grumman. Upon completion of boot camp, quartermaster’s school, and visual communications training, he deployed to the Pacific aboard the USS Undaunted (ATA-199). He towed the USS Hugh W. Hadley (DD-774) from Kerama Retto to the States, traveling through a typhoon; after the storm cleared, the tow line parted nine times. After the war, his tug was busy helping ships that overestimated their capabilities in a hurry to get home. He was transferred to the USS ATR-40 for the Bikini atomic bomb testing, where he was 10 miles from the target during the detonations. His salvage unit was ordered to spend more than what was thought to be a safe amount of time aboard the USS Pennsylvania (BB-38), without safety equipment, operating pumps to keep it afloat. Grahlfs later based his dissertation on interviews with veterans who had been exposed to nuclear weapons testing; he found that although more than half reported illness due to radiation exposure, the military never recognized their claims. When Grahlfs returned to the States, he was treated for rare symptoms that fascinated …
Date: May 11, 2012
Creator: Grahlfs, Lincoln
Object Type: Sound
System: The Portal to Texas History
Oral History Interview with Tom English, May 11, 2012 transcript

Oral History Interview with Tom English, May 11, 2012

The National Museum of the Pacific War presents an interview with Tom English. English was born 17 October 1926 in Manhattan, New York. As a 17 year old in 1944, he enlisted in the Navy. After boot camp at the Naval Training Center at Sampson, New York, he went to Treasure Island where he reported aboard USS Hugh Hadley (DD-774) and sailed with a task force headed for Okinawa. Hadley escorted cargo ships during the battle and was eventually assigned picket duty. On 11 May 1945, Hadley shot down 23 Japanese aircraft, a record, but was also hit by bombs and kamikazes. English was in the ammo handling room for mount 51. One of the bomb hits knocked him unconscious, cutting his head and crushing one of his feet. He came to on deck as the ship was being abandoned. Despite the damage, Hadley stayed afloat and was towed to the West Coast, where she was scrapped. English went aboard an APA, then a hospital ship. He received treatment at Tinian, Pearl Harbor, Oakland, San Diego, and finally St. Albans in New York. After his foot healed, he was assigned briefly to USS Leyte (CV-32). He was discharged from the …
Date: May 11, 2012
Creator: English, Tom
Object Type: Sound
System: The Portal to Texas History
Oral History Interview with Frank Boffi, May 11, 2012 transcript

Oral History Interview with Frank Boffi, May 11, 2012

The National Museum of the Pacific War presents an oral interview with Frank Boffi. Boffi joined the Navy in September 1942 and received basic training in Newport. Boffi was assigned to the USS Bernadou (DD-153) as a machinist???s mate. He participated in the invasions of Sicily, Salerno, and Anzio. In June 1944 he was transferred to Norfolk to oversee the construction of the USS Hugh W. Hadley (DD-774). He joined the ship???s company, working in the engine room. He was badly burned during the kamikaze attack off of Okinawa, when damage to the ship sent hot steam blasting toward him as he escaped the engine room. A corpsman rescued Boffi, administered morphine. Boffi awoke two days later aboard the USS Solace (AH-5) and was transferred to Tinian, where he received the Purple Heart. He spent the next four months recovering and was discharged in November 1945. Boffi worked for the American Society of Safety Engineers until he retired at the age of 84.
Date: May 11, 2012
Creator: Boffi, Frank
Object Type: Sound
System: The Portal to Texas History
Oral History Interview with Martin Weibel, May 11, 2012 transcript

Oral History Interview with Martin Weibel, May 11, 2012

The National Museum of the Pacific War presents an interview with Martin Weibel. Weibel was drafted into the Navy in April of 1944. He served aboard the USS Hugh W. Hadley (DD-774) as a watertender, working with the boilers in the ship???s engine room. He provides some detail of his work and life on board the Hadley. In December of 1944 they traveled to Leyte and Saipan. The Hadley provided escort duty and served on picket duty. Weibel describes a severe attack by enemy aircraft in May of 1945. Though greatly damaged the crew managed to get the Hadley to Kerama Retto for repairs. Weibel describes their adventures through a typhoon. He was discharged in June of 1946.
Date: May 11, 2012
Creator: Weibel, Martin
Object Type: Sound
System: The Portal to Texas History
The Altus Times (Altus, Okla.), Vol. 112, No. 280, Ed. 1 Friday, May 11, 2012 (open access)

The Altus Times (Altus, Okla.), Vol. 112, No. 280, Ed. 1 Friday, May 11, 2012

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: May 11, 2012
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
Oral History Interview with Lincoln Grahlfs, May 11, 2012 (open access)

Oral History Interview with Lincoln Grahlfs, May 11, 2012

The National Museum of the Pacific War presents an oral interview with Lincoln Grahlfs. Grahlfs joined the Navy in October 1942 after working at Grumman. Upon completion of boot camp, quartermaster’s school, and visual communications training, he deployed to the Pacific aboard the USS Undaunted (ATA-199). He towed the USS Hugh W. Hadley (DD-774) from Kerama Retto to the States, traveling through a typhoon; after the storm cleared, the tow line parted nine times. After the war, his tug was busy helping ships that overestimated their capabilities in a hurry to get home. He was transferred to the USS ATR-40 for the Bikini atomic bomb testing, where he was 10 miles from the target during the detonations. His salvage unit was ordered to spend more than what was thought to be a safe amount of time aboard the USS Pennsylvania (BB-38), without safety equipment, operating pumps to keep it afloat. Grahlfs later based his dissertation on interviews with veterans who had been exposed to nuclear weapons testing; he found that although more than half reported illness due to radiation exposure, the military never recognized their claims. When Grahlfs returned to the States, he was treated for rare symptoms that fascinated …
Date: May 11, 2012
Creator: Grahlfs, Lincoln
Object Type: Text
System: The Portal to Texas History
Oral History Interview with Tom English, May 11, 2012 (open access)

Oral History Interview with Tom English, May 11, 2012

The National Museum of the Pacific War presents an interview with Tom English. English was born 17 October 1926 in Manhattan, New York. As a 17 year old in 1944, he enlisted in the Navy. After boot camp at the Naval Training Center at Sampson, New York, he went to Treasure Island where he reported aboard USS Hugh Hadley (DD-774) and sailed with a task force headed for Okinawa. Hadley escorted cargo ships during the battle and was eventually assigned picket duty. On 11 May 1945, Hadley shot down 23 Japanese aircraft, a record, but was also hit by bombs and kamikazes. English was in the ammo handling room for mount 51. One of the bomb hits knocked him unconscious, cutting his head and crushing one of his feet. He came to on deck as the ship was being abandoned. Despite the damage, Hadley stayed afloat and was towed to the West Coast, where she was scrapped. English went aboard an APA, then a hospital ship. He received treatment at Tinian, Pearl Harbor, Oakland, San Diego, and finally St. Albans in New York. After his foot healed, he was assigned briefly to USS Leyte (CV-32). He was discharged from the …
Date: May 11, 2012
Creator: English, Tom
Object Type: Text
System: The Portal to Texas History
Oral History Interview with Frank Boffi, May 11, 2012 (open access)

Oral History Interview with Frank Boffi, May 11, 2012

The National Museum of the Pacific War presents an oral interview with Frank Boffi. Boffi joined the Navy in September 1942 and received basic training in Newport. Boffi was assigned to the USS Bernadou (DD-153) as a machinist???s mate. He participated in the invasions of Sicily, Salerno, and Anzio. In June 1944 he was transferred to Norfolk to oversee the construction of the USS Hugh W. Hadley (DD-774). He joined the ship???s company, working in the engine room. He was badly burned during the kamikaze attack off of Okinawa, when damage to the ship sent hot steam blasting toward him as he escaped the engine room. A corpsman rescued Boffi, administered morphine. Boffi awoke two days later aboard the USS Solace (AH-5) and was transferred to Tinian, where he received the Purple Heart. He spent the next four months recovering and was discharged in November 1945. Boffi worked for the American Society of Safety Engineers until he retired at the age of 84.
Date: May 11, 2012
Creator: Boffi, Frank
Object Type: Text
System: The Portal to Texas History
Oral History Interview with Martin Weibel, May 11, 2012 (open access)

Oral History Interview with Martin Weibel, May 11, 2012

The National Museum of the Pacific War presents an interview with Martin Weibel. Weibel was drafted into the Navy in April of 1944. He served aboard the USS Hugh W. Hadley (DD-774) as a watertender, working with the boilers in the ship???s engine room. He provides some detail of his work and life on board the Hadley. In December of 1944 they traveled to Leyte and Saipan. The Hadley provided escort duty and served on picket duty. Weibel describes a severe attack by enemy aircraft in May of 1945. Though greatly damaged the crew managed to get the Hadley to Kerama Retto for repairs. Weibel describes their adventures through a typhoon. He was discharged in June of 1946.
Date: May 11, 2012
Creator: Weibel, Martin
Object Type: Text
System: The Portal to Texas History