+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Centroiding algorithms for high speed crossed strip readout of microchannel plate detectors

, : Centroiding algorithms for high speed crossed strip readout of microchannel plate detectors. Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment 633(S1): S255-S258

Imaging microchannel plate (MCP) detectors with cross strip (XS) readout anodes require centroiding algorithms to determine the location of the amplified charge cloud from the incident radiation, be it photon or particle. We have developed a massively parallel XS readout electronic system that employs an amplifier and ADC for each strip and uses this digital data to calculate the centroid of each event in real time using a field programmable gate array (FPGA). Doing the calculations in real time in the front end electronics using an FPGA enables a much higher input event rate, nearly two orders of magnitude faster, by avoiding the bandwidth limitations of the raw data transfer to a computer. We report on our detailed efforts to optimize the algorithms used on both an 18 mm and 40 mm diameter XS MCP detector with strip pitch of 640 microns and read out with multiple 32 channel "Preshape32" ASIC amplifiers (developed at Rutherford Appleton Laboratory). Each strip electrode is continuously digitized to 12 bits at 50 MHz with all 64 digital channels (128 for the 40 mm detector) transferred to a Xilinx Virtex 5 FPGA. We describe how events are detected in the continuous data stream and then multiplexed into firmware modules that spatially and temporally filter and weight the input after applying offset and gain corrections. We will contrast a windowed "center of gravity" algorithm to a convolution with a special centroiding kernel in terms of resolution and distortion and show results with < 20 microns FWHM resolution at input rates > 1 MHz.


PMID: 21918588

DOI: 10.1016/j.nima.2010.06.181

Other references

Trofimova I.A., 1991: Regularity of variation of oil hydrocarbon composition in the process of migration; laboratory simulation. Pages 175-180:

Dulawa, J.; Kokot, M.; Nowicki, M.; Kokot, F., 1993: Does Tamm-Horsfall protein play a role in water electrolyte metabolism in hypertensive patients?. European Journal of Clinical Investigation 23(SUPPL 1): A21

Leitch, C.J.; Moore, G.B., 1982: Thinning of radiata pine by crawler tractor on steep slopes in north-eastern Victoria: a preliminary study. In a delayed first thinning of an 18-yr-old stand on slopes of >50%, average daily productivity over 5 working days was compared with records from operations on a range of slopes in the locality. There was no evidence that slope had any substan...

Voskoboinik, Lk, 1977: Use of materials of the collection in heterosis breeding of sunflower. Biulleten' 9 51-53

Robinson, SW., 1981: Comment on a radiocarbon-dated (Wisconsinan) molluscan fauna from southeastern Kansas by B.B. Miller. Journal of Paleontology, 551: 271-272

Gu, A.; Ji, G.; Zhou, Y.; Long, Y.; Shi, X.; Fu, G.; Wang, S.; Song, L.; Wang, X., 2011: Polymorphisms of nucleotide-excision repair genes may contribute to sperm DNA fragmentation and male infertility. The nucleotide-excision repair (NER) system is crucial for the removal of bulky DNA adducts during spermatogenesis. Dysfunction of its repair capacity is likely related to the increased susceptibility to DNA damage. In this study, four polymorphis...

Park, J.Y.; Elshami, A.A.; Sterman, D.H.; Rizk, N.P.; Amin, K.; Coonrod, L.; Kaiser, L.R.; Albelda, S.M., 1996: Retinoids augment the bystander effect in HSVtk/GCV mediated gene therapy by enhanced gap junctional intercellular communication. Cancer Gene Therapy 3(6 CONF SUPPL ): S34

Negra, M.D.; Queiroz, W.; Lian, Y.C.; Mangini, A.C.; Dias, A.M.; Palacci, M.; Tanaka, H.; Giudice, M.C., 1995: Clinical and epidemiological aspects of diarrheal illness in pediatric AIDS patients in São Paulo, Brazil. Pediatric Aids and HIV Infection 6(6): 335-339

Svendsen, U.G.; Nørgaard, M.A.; Andersen, C.B.; Arendrup, H.C.; Efsen, F.; Mortensen, S.A.; Olsen, P.S.; Thiis, J.J.; Pettersson, G., 1997: Clinical results after en block double lung transplantation with direct bronchial revascularization. The first three and a half years' experience in Denmark. En-bloc double lung transplantation with tracheal anastomosis and direct revascularization of the bronchial arteries to the left internal mammary artery has been carried out in Denmark since June 1992. Forty-seven patients (32 with alfa-1 antitryp...

de Ribaupierre, S.; Dorfmüller, G.; Bulteau, C.; Fohlen, M.; Pinard, J-Marc.; Chiron, C.; Delalande, O., 2007: Subependymal giant-cell astrocytomas in pediatric tuberous sclerosis disease: when should we operate?. OBJECTIVE: A small percentage of tuberous sclerosis patients will develop a subependymal giant-cell astrocytoma. Given the morbidity and morality when such a lesion is left undiagnosed, successive follow-up imaging in pediatric patients has been...