Документ взят из кэша поисковой машины. Адрес оригинального документа : http://danp.sinp.msu.ru/pci2012/vecher29_2.pdf
Дата изменения: Tue May 22 23:31:06 2012
Дата индексирования: Mon Oct 1 21:22:23 2012
Кодировка:
APPLICATION OF THE DIFFRACTION RADIATION INTERFEROGRAM OBTAINED AFTER THE INTERACTION OF AN ELECTRON BEAM WITH A SLIT TARGET D.A. Shkitov1), G.A. Naumenko1), M.V. Shevelev1), A.P. Potylitsyn1), H. Deng2), X. Wang 1) TPU, Tomsk, Russia 2) SINAP, Shanghai, China
2)

In October 2011 a joint Russian-Chinese experiment on the extracted beam of the microtron TPU was carried out. In particular, the interferogram of coherent diffraction radiation (CDR) from a slit target w as measured. Fig. 1 shows a top view of this target. Earlier we developed a model to calculate the CDR in the far- or near-field zone as well as taking into account the finite size of the target /1/. Based on this model subject to the detector sensitivity function is shown that a comparison of theoretical with experimental interferograms can provide info rmation about a e longitudinal size of the bunch and also that this method agrees with the previously proposed empirical method /2/. V Parameters of microtron: an electron energy E = 6.1 MeV or = 12, a bunch length RMS ~ 2 mm, a diameter of cutoff waveguide D = 10 mm, a slit width a = 2 mm. d This work was supported by the joint Russian-Chinese grant RFBR 11-02-91177Fig. 1. Slit target ­ top view GFEN_a. REFERENCES 1. Shkitov D.A., Potylitsyn A.P. // Book of abstracts IX International symposium «Radiation from relativistic electron in periodic structure» RREPS'11, 11-16 September 2011. ­ p. 70 2. Naumenko G.A., Potylitsyn A.P. et al. // Izv. Vuzov. Fizika, 2009, 11/2, ­ pp. 254 ­ 260. .. 1), .. 2) () .
1)

2)

, , , . , . . , . , . , , . . .. , .. , .. , .. , , /1/, . , , , . , , , , (). (. /2/) . , , . , . 1. 2. .., .., .. // . XLI // .: - , 2011, . 31. .., .., .. // , 1997, 2, . 107 ­ 110.


.. , , , . /1/ (1200 ) , . /2/ () , . () . , . . 1. 2. .. , .. , . , . , . 20 . 20 , .. . . , 03, 4, .116-120. , .. . . , 11, 7, . 46-51.

CALCULATE THE EFFICIENCY OF GAMMA-RAY DETECTORS FOR INVERTED WELL BEAKER SOURCES USING AN ANALYTICAL EFFICIENCY TRANSFER PRINCIPLE M.S. Badawi, S.S. Nafee, S.M. Diab, A.M. el-Khatib and E.A. el-Mallah Physics Department, Faculty of Science, Alexandria University, 21511 Alexandria, Egypt Different sources efficiency measurements and the construction of the co rresponding calibration curve are usually carried out in gamma-ray spectrometry to calculate the unknown activity for different sources in the same geometry or in order to facilitate the efficiency computation of different sources geometries by the use of the efficiency transfer method. In this work, the Full Energy Peak Efficiency values (FEPE) of HPGe detector have been calculated using axial inverted well beaker sources of different dimensions by an analytical approach of effective solid angle ratio. Calculation taking into account the source self atten uation effect, this approach is based on the direct mathematical method. In the experiments gamma aqueous sources containing 152Eu radionuclide's covering the energy range from 121 to 1408 keV were used. By comparison, the the oretical and experimental fullenergy peak efficiency values are in good agreement. , , .. , , () (). , /1/. /2/ . , , , . , . . 1. 2. ... . ., . . . 2011. 3. .5. ... . ., . . . 2012. 3. 2012, 3.