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X-ray radiographic technique for measuring density uniformity of silica aerogel
- Source :
- Nucl. Instr. and Meth. A 697 (2013) 52
- Publication Year :
- 2012
-
Abstract
- This paper proposes a new X-ray radiographic technique for measuring density uniformity of silica aerogels used as radiator in proximity-focusing ring-imaging Cherenkov detectors. To obtain high performance in a large-area detector, a key characteristic of radiator is the density (i.e. refractive index) uniformity of an individual aerogel monolith. At a refractive index of n = 1.05, our requirement for the refractive index uniformity in the transverse plane direction of an aerogel tile is |\delta (n - 1)/(n - 1)| < 4% in a focusing dual layer radiator (with different refractive indices) scheme. We applied the radiographic technique to evaluate the density uniformity of our original aerogels from a trial production and that of Panasonic products (SP-50) as a reference, and to confirm they have sufficient density uniformity within \pm 1% along the transverse plane direction. The measurement results show that the proposed technique can quantitatively estimate the density uniformity of aerogels.<br />Comment: To be published in Nucl. Instr. and Meth. A, 8 pages, 6 figures, 1 table
Details
- Database :
- arXiv
- Journal :
- Nucl. Instr. and Meth. A 697 (2013) 52
- Publication Type :
- Report
- Accession number :
- edsarx.1212.3560
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1016/j.nima.2012.09.001