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These pages provide an access point to data contained in CCFE published journal papers.  By selecting a paper, and then a specific figure or table, you can request the related underlying data if it is available for release.

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Open Data for a Publication Figure

Date:
2018-07-19

First Author:
D.R. Mason

Title:
Experimental observation of the number of visible defects produced in individual primary damage cascades in irradiated tungsten

Figure Reference:
fig 3

Figure Title:
fig3

Figure Identifier:
CF/18/314

Paper Identifier:
CP/18/78

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Title Description Identifier Download Open Data
fig 3 & 4 The experimentally observed count, N(m;A), for the m-tuples of spots which may be contained in a minimum enclosing circle (MEC) with diameter less than or equal to d = 8nm ( see text ). Error bars denote counts of spots with intensities over di erent critical thresholds, with signi cance levels = 0:15 (higher value of error bar) to = 0:001, with the symbol at signi cance level = 0:025. The shaded region indicates a best t for this observed count, assuming that individual cascades are independently generated. Again the upper and lower bounds correspond to intensity threshold signi cance levels of = 0:15 and = 0:001. 10-6 The main result of this letter, the tted distribution for the number of visible spots generated in individual primary damage cascades. Error bars denote counts of spots with intensities over di erent critical thresholds, with signi cance levels = 0:15 (higher value of error bar) to = 0:001, with the symbol at signi cance level = 0:025. Only the assumption of independent ( non-overlapping ) individual cascades is used for this tting. The shaded region indicates a possible alternative t (using the same threshold intensities for sampling the spots), with the additional assumption that the number of radiationinduced defect clusters produced in each cascade is Poisson distributed. per MEC, ie N(m;A), gives the shaded region in gure 4. This appears to be a good approximation for the best t we were able to produce. We should stress that coin- cidence of these results should not imply causality - we have not proved here that visible defects are produced in- dependently within individual cascades, only that the ex- perimental evidence we have gathered is not inconsistent with this model. Our analysis here is two-dimensional, based on the ex- pected count of spots in a circular area. The three- dimensional nature of the cascade damage becomes rel- evant if there is a chance CD/18/316 Download

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    Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, Oxfordshire, OX14 3DB, UK. This work is funded by the UK Engineering and Physical Sciences Research Council (EPSRC) and EURATOM

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