Laser produced X-ray source in the 10-60 keV range at 1 kHz. Modified irradiation schemes in order to reach medical imaging quality
(2001) In Journal de Physique IV 11(PR2). p.429-432- Abstract
- By tightly focusing ultra-short pulses from a Ti:sapphire terawatt laser onto a high-Z metallic target, hard x-ray pulses of short duration are produced. In most of our previous work concerning x-rays, a 150 mJ laser pulse with a 110 A duration has been used. Using mostly tin and tantalum targets, hard x-rays in the 10-60 keV range have been produced and used in differential absorption imaging around the K-alpha absorption edge of a contrast agent and also in imaging employing gated viewing for suppression of scattered radiation. In order to increase the x-ray yield (shortening the acquisition time) an increase in the laser repetition rate is desirable while still staying in the K-alpha energy regime. We have used a I kHz repetition-rate... (More)
- By tightly focusing ultra-short pulses from a Ti:sapphire terawatt laser onto a high-Z metallic target, hard x-ray pulses of short duration are produced. In most of our previous work concerning x-rays, a 150 mJ laser pulse with a 110 A duration has been used. Using mostly tin and tantalum targets, hard x-rays in the 10-60 keV range have been produced and used in differential absorption imaging around the K-alpha absorption edge of a contrast agent and also in imaging employing gated viewing for suppression of scattered radiation. In order to increase the x-ray yield (shortening the acquisition time) an increase in the laser repetition rate is desirable while still staying in the K-alpha energy regime. We have used a I kHz repetition-rate laser delivering 35 fs pulses in order to work towards these goals. We have clear evidence of hard x-ray generation above 30 keV, even for low laser pulse energies. We also studied the effect of a fs prepulse. The medical imaging capability of the source was explored. The use of a prepulse has been optimized in order to improve the image quality as well as the overall x-ray generation yield. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2257054
- author
- Albert, F ; Sjogren, A ; Wahlström, Claes-Göran LU ; Svanberg, Sune LU ; Olsson, C and Merdji, H
- organization
- publishing date
- 2001
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal de Physique IV
- volume
- 11
- issue
- PR2
- pages
- 429 - 432
- publisher
- EDP Sciences
- external identifiers
-
- scopus:0034821510
- ISSN
- 1155-4339
- DOI
- 10.1051/jp4:2001283
- language
- English
- LU publication?
- yes
- id
- b3e38102-ccbb-4ed3-a7b7-233be5a955ba (old id 2257054)
- date added to LUP
- 2016-04-04 08:16:54
- date last changed
- 2022-01-29 03:16:04
@article{b3e38102-ccbb-4ed3-a7b7-233be5a955ba, abstract = {{By tightly focusing ultra-short pulses from a Ti:sapphire terawatt laser onto a high-Z metallic target, hard x-ray pulses of short duration are produced. In most of our previous work concerning x-rays, a 150 mJ laser pulse with a 110 A duration has been used. Using mostly tin and tantalum targets, hard x-rays in the 10-60 keV range have been produced and used in differential absorption imaging around the K-alpha absorption edge of a contrast agent and also in imaging employing gated viewing for suppression of scattered radiation. In order to increase the x-ray yield (shortening the acquisition time) an increase in the laser repetition rate is desirable while still staying in the K-alpha energy regime. We have used a I kHz repetition-rate laser delivering 35 fs pulses in order to work towards these goals. We have clear evidence of hard x-ray generation above 30 keV, even for low laser pulse energies. We also studied the effect of a fs prepulse. The medical imaging capability of the source was explored. The use of a prepulse has been optimized in order to improve the image quality as well as the overall x-ray generation yield.}}, author = {{Albert, F and Sjogren, A and Wahlström, Claes-Göran and Svanberg, Sune and Olsson, C and Merdji, H}}, issn = {{1155-4339}}, language = {{eng}}, number = {{PR2}}, pages = {{429--432}}, publisher = {{EDP Sciences}}, series = {{Journal de Physique IV}}, title = {{Laser produced X-ray source in the 10-60 keV range at 1 kHz. Modified irradiation schemes in order to reach medical imaging quality}}, url = {{https://lup.lub.lu.se/search/files/5174560/2296933.pdf}}, doi = {{10.1051/jp4:2001283}}, volume = {{11}}, year = {{2001}}, }