Accession Number:

ADA288301

Title:

Ultralshort High Peak Power Lasers and Generation of Hard Incoherent X-Rays,

Descriptive Note:

Corporate Author:

STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS

Personal Author(s):

• Barty, C. P.
• Gordon, G. L., III
• Kmetec, J. D.
• Lemoff, B. E.
• Harris, S. E.

Report Date:

1992-12-10

Pagination or Media Count:

10.0

Abstract:

The design, construction, and use of high peak power infrared laser pulses for the generation of diagnostic 20 keV to 150 keV x-rays are discussed. A review of recent laser-plasma generation of diagnostic x-rays is presented. The advantages of such sources include subpicosecond pulse duration and extremely small source size. Because of their short duration, it shoud be possible to form time-gated medical images with up to eight times less x-ray flux than with conventional x-ray sources. Details of a next generation laser driver are also presented. Generation of 20-fs pulses from a regeneratively initiated, self-mode-locked Ti Sapphire laser is described. Techniques for amplification of these pulses to peak powers of 5 TW are presented.

Descriptors:

• *LASER PUMPING
• *COMPUTER AIDED DIAGNOSIS
• *X RAY DIAGNOSTIC HIGH POWER
• SOURCES
• FLUX(RATE)
• PLASMAS(PHYSICS)
• GATES(CIRCUITS)
• OPTICAL IMAGES
• X RAYS
• TIME
• SHORT RANGE(TIME)
• DIAGNOSIS(MEDICINE)
• INCOHERENCE
• MEDICINE
• PEAK POWER
• PULSE RATE
• SAPPHIRE

Subject Categories:

• Medicine and Medical Research
• Medical Facilities, Equipment and Supplies
• Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE