A low
A small power x-ray source and its applications in medicine
Reporter: Danut Dragoi, PhD
In recent years, the scientists at UCLA Los Angeles CA http://www.nature.com/news/2008/081022/full/news.2008.1185.html have shown that simply peeling ordinary sticky tape in a vacuum can generate enough x-rays to take an image.
With the support from DARPA and private investors, a company was created, Tribogenics, to produce an unconventional x-ray source https://gigaom.com/2011/12/06/darpa-backed-start-up-builds-iphone-sized-x-ray-machines/ that doesn’t need vacuum, cooling system, and high voltage generator. The CEO of that company explains the applications in medicine: http://exponential.singularityu.org/medicine/dale-fox. The new x-ray source is non-expensive and affordable for more people in the field of medicine. Dale Fox, the CEO of Tribogenics company stated that about 4 billion people can benefit from this new x-ray source. The prospects for the new x-ray source and devices associated with are favorable for a steady growth, the year 2015 is a turning point in the production of the new devices for medical industry.
SOURCE
Camara, C. G., Escobar, J. V., Hird, J. R. & Putterman, S. J. Nature455, 1089–1092 (2008).
Nature 455, 1089-1092 (23 October 2008) | doi:10.1038/nature07378; Received 30 December 2007; Accepted 27 August 2008
Correlation between nanosecond X-ray flashes and stick–slip friction in peeling tape
Carlos G. Camara1,2, Juan V. Escobar1,2, Jonathan R. Hird1 & Seth J. Putterman1
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA
- These authors contributed equally to this work.
Correspondence to: Carlos G. Camara1,2Juan V. Escobar1,2 Correspondence and requests for materials should be addressed to C.C. (Email: camara@physics.ucla.edu) or J.E. (Email: escobar@physics.ucla.edu).
Correlation between nanosecond X-ray flashes and stick–slip friction in peeling tape
Carlos G. Camara1,2, Juan V. Escobar1,2, Jonathan R. Hird1 & Seth J. Putterman1
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA
- These authors contributed equally to this work.
Correspondence to: Carlos G. Camara1,2Juan V. Escobar1,2Correspondence and requests for materials should be addressed to C.C. (Email: camara@physics.ucla.edu) or J.E. (Email: escobar@physics.ucla.edu).
Abstract
Relative motion between two contacting surfaces can produce visible light, called triboluminescence1. This concentration of diffuse mechanical energy into electromagnetic radiation has previously been observed to extend even to X-ray energies2. Here we report that peeling common adhesive tape in a moderate vacuum produces radio and visible emission3, 4, along with nanosecond, 100-mW X-ray pulses that are correlated with stick–slip peeling events. For the observed 15-keV peak in X-ray energy, various models5, 6 give a competing picture of the discharge process, with the length of the gap between the separating faces of the tape being 30 or 300 μm at the moment of emission. The intensity of X-ray triboluminescence allowed us to use it as a source for X-ray imaging. The limits on energies and flash widths that can be achieved are beyond current theories of tribology.
SOURCE
http://www.nature.com/news/2008/081022/full/news.2008.1185.html
http://www.nature.com/nature/journal/v455/n7216/full/nature07378.html
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