We propose to develop a solid state laser pumped 3-5 micron gas laser for tactical airborne countermeasure applications. This laser will be an alternative to damage prone nonlinear optics for down converting existing diode pumped solid state lasers into the mid-infrared. In Phase I we will examine… More

Lack of uniform controlled drop spray size is a major obstacle to the safe and effective application of pesticide sprays. increased environmental and economic constraints make it necessary to develop spray equipment designed to reduce spray drift and to insure maximum deposition on target areas. in… More

50199-98-I Nondestructive Beam Diagnostic Using Diffraction Radiation--STI Optronics, Inc., 2755 Northup Way, Bellvue, WA 98004-1403; (425) 827-0460 Dr. Wayne D. Kimura, Principal Investigator Dr. Kem E. Robinson, Business Official DOE Grant No. DE-FG03-98ER82673 Amount: $75,000 Advanced… More

65179 Next generation linear colliders (NLC) will require large quantities of ultra-stable quadrupole focusing magnets along the beamline, with magnetic center shifts less than 1.4 micrometers. Conventional magnets would have difficulty obtaining this stability. Not only are capital and… More

Chemical oxygen iodine lasers are efficient, scalable, and have proven ability in generating weapons class laser power. To support the future high power COIL programs, technology improvements must be realized to more easily meet the operationalrequirements, such as for the ABL EDM phase. In… More

"Chemical oxygen iodine lasers are efficient, scalable, and have a proven ability to generate weapons class laser power. To support the future high power COIL programs, technology improvements must be realized to increase performance, efficiency, andchemical operating range, and thus more easily… More

65179 Quadrupole focusing magnets for the Next Linear Collider will require magnetic centerline stability of

65179 Quadrupole focusing magnets for the Next Linear Collider will require magnetic centerline stability of

76053-In laser wakefield acceleration, a plasma formed in a gas jet is used to create very high acceleration gradients to accelerate electrons. Scaling of laser wakefield acceleration to higher net energy gains requires gas jets that not only are centimeters long, but also have sharp edge density… More

75779-Both U.S. and European scientists are evaluating the use of permanent magnet wigglers in the damping rings of linear colliders to reduce vertical emittance. These wigglers pose unique analysis, design, and engineering challenges. The first challenge is to control the nonlinear dynamics… More

75779S Both U.S. and European scientists are evaluating the use of permanent magnet wigglers to reduce emittance in the damping rings linear colliders. This project will address two problems related to this approach: (1) nonlinear magnetic fields and transverse roll-off can disrupt the beam… More

Because of its high acceleration gradient, laser wakefield acceleration (LWFA) holds the promise of producing high energy electrons in a compact geometry. A gas jet is one means for producing the plasma needed for LWFA; however, scaling the gas jet to longer lengths with sharp edge densities has… More

Advanced electron accelerators that utilize a plasma wave or wakefield to accelerate electrons need the incoming electrons grouped together into microbunches. These microbunches must have a length that is a fraction of the accelerating wavelength and a spacing that equals the period of the… More

Tabletop plasma laser accelerators require bunched electron beams as inputs. An ideal source for this bunched beam would be a free electron laser that operates at terahertz frequencies. The addition of a terahertz waveguide to the free electron laser would permit efficient bunching with low input… More

Supersonic gas jet nozzles, used to generate the plasma part of a laser wakefield acceleration (LWFA) system, would enable the development of high-gradient advanced electron accelerators. However, the nozzle requires sharp boundaries between the jet stream and the surrounding vacuum. Such sharp… More

Plasma wakefield acceleration (PWFA) is a promising new acceleration technique that can accelerate charged particles to very high energies using plasma waves (wakefields) generated by a relativistic electron bunch. By using a concept called a plasma afterburner, PWFA has the potential of doubling… More

A CO2 laser with subnanosecond pulse duration and high pulse energy will be developed for double-resonance remote sensing lidar applications. An innovative technique for generating the ultrashort laser pulses will be utilized. A detailed conceptual design will be made during Phase I and a… More

DESCRIPTION (provided by applicant): Narrowband Terahertz Imager for Nonmelanoma Skin Cancer Detection Terahertz (THz) radiation is nonionizing and safe for probing human tissue. Unlike ultrasound, THz light is capable of submillimeter resolution and, unli ke other imaging techniques, THz light is… More

Laser Wakefield acceleration (LWFA) has demonstrated the ability to accelerate electrons in a plasma with gradients >30 GeV/m where a capillary discharge is used as the plasma source. The capillary discharge has a parabolic plasma density profile that is able to guide the focused laser beam used to… More

An innovative prototype tunable CO2 laser system with subnanosecond pulse duration and high peak power will be built and delivered for experiments on double-resonance remote sensing of gaseous chemical agents being conducted at the Army Aviation and Missile Research, Development, and Engineering… More

Laser wakefield acceleration (LWFA) has demonstrated the ability to accelerate electrons in a plasma with gradients & gt;30 GeV/m where a capillary discharge is used as the plasma source. The capillary discharge has a parabolic plasma density profile that is able to guide the focused laser beam… More