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Analysis of specimen composition with the complex method using the backscattered electrons

100%

Kaczmarek D. , Detka A.

2002

tom Vol. 32, nr 4

859-867

For the investigation of different types of welds joined with electron beam the methods like the X-ray microanalysis or microscopic examination of cross-sections are usually employed. The work presents the improved method of specimen composition analysis with backscattered electron signal (BSE) in the scanning electron microscope (SEM). The method consists in: the application of the separation of information about composition and topography of examined specimens by introducing a correction term into the algorithm of COMPO mode creation, the linearization of backscattering coefficient characteristics versus an atomic number and application of colour simulation. The verification of obtained results has been done on the example of W-Mo weld by typical methods employed in metallography.

Przepływomierz cieplnoprzewodnościowy

80%

Detka A. , Kirczuk C. , Wiśniewski K.

Prace Naukowe Politechniki Warszawskiej. Elektronika

2005

tom z. 153

157-160

A thick layer gas sensor, fabricated in the Faculty of Microsystem Electronics and Photonics at Wrocław University of Technology has been used in the construction of a heat conductivity flowmeter. It was found, that about 60 % of the energy is dissipated from the heated sensor by heat conductivity of a surrounding gas at the atmospheric pressure. Two methods of the heater supply conditions have been studied: U=constant and T=constant. Measuring range of the designed heat coductivity flow-meter was 10(-2) W +20W.

Pompa kriosorpcyjna PK-160M

70%

Detka A. , Hałas A. , Kirczuk C. , Moraw M. , Prasoł H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

1999

tom z. 123

183-186

Cryosorption pump used for generating ultra high, clean vacuum, is described. The pump PK-160M reaches 850 l/s pumping speed for nitrogen and 1000 l/s for hydrogen and makes possible to obtain ultimate pressure below 10(-10) mbar after l hour baking at 100° C.

Separacja zanieczyszczeń olejowych z wylotowego strumienia pompy rotacyjnej

70%

Detka A. , Hałas S. , Kirczuk C. , Moraw M. , Prasoł H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

1999

tom z. 123

177-182

Oil mist emitted by rotary vacuum pump contaminates the enyironment and atmosphere in technological rooms. The oil separator is a one of the effective means of reducing contamination quantity. The efficiency of separator with polypropylene fibber reaches 90 - 99,9%. Used as the 1-st stage of cleaning system, the separator extends the effective life times of charcoal output trap about 100 times.

Optymalizacja parametrów chłodziarki helowej

70%

Detka A. , Hałas A. , Kirczuk C. , Moraw M. , Prasoł H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

1999

tom z. 123

97-102

The results of work on final temperature decrease of two-stage gifford-McMahon cryogenerator are presented. Due to increase of regenerator heat capacity and of the regenerator power, as well as optimization of the thermodynamic cycle the final cryogenerator temperature has fallen below 10 K.