Document details

Large area APDs for low energy X-ray detection in intense magnetic fields

Author(s): Boucher, M. cv logo 1 ; Huot, O. cv logo 2 ; Knowles, P. E. cv logo 3 ; Ludhova, L. cv logo 4 ; Mulhauser, F. cv logo 5 ; Schaller, L. A. cv logo 6 ; Conde, C. A. N. cv logo 7 ; Santos, J. M. F. dos cv logo 8 ; Fernandes, L. M. P. cv logo 9 ; Veloso, J. F. C. A. cv logo 10 ; Kottmann, F. cv logo 11 ; Antognini, A. cv logo 12 ; Pohl, R. cv logo 13 ; Taqqu, D. cv logo 14

Date: 2003

Persistent ID: http://hdl.handle.net/10316/4471

Origin: Estudo Geral - Universidade de Coimbra

Subject(s): Photon detectors; X-ray detection; Avalanche photodiodes; Magnetic field


Description
An experiment to measure the energy difference between the 2S-2P atomic levels (Lamb shift) in muonic hydrogen is being prepared at PSI. Since the energy levels of muonic hydrogen are a factor of 186 more energetic than those of hydrogen, according to the ratio of reduced masses, the transitions lie in the soft X-ray region. The experiment needs long-lived muonic hydrogen in the 2S state. This is achieved by stopping a low energy muon beam in a small volume of low pressure hydrogen in a 5 T magnetic field. A pulsed beam from a tunable laser induces the 2S-2P transition and the 1.9 keV X-ray photons resulting from the 2P-1S deexcitation will be detected. Measuring the coincidences between the laser pulse and the X-ray as a function of the laser wavelength allows us to determine the Lamb shift. In this presentation we will discuss the perspectives of using large area avalanche photodiodes for the direct detection of the X-rays. Compared to gaseous detectors, they are more compact and simpler in operation. They are also insensitive to magnetic fields. http://www.sciencedirect.com/science/article/B6TJM-4871204-X/1/e33bbbdca623e18bf326aab66966ba9f
Document Type Article
Language English
delicious logo  facebook logo  linkedin logo  twitter logo 
degois logo
mendeley logo

Related documents



    Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento EU