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Limitations of thermoluminescent dosimeters in soft X-ray diagnostics of pulsed plasma

100%

Krása J. , Fárníková M. , Juha L. , Cejnarová A.

2001

tom Vol. 46, suppl. 1

49--51

Responses of thermoluminescent dosimeters (TLDs) of CaF2:Dy, CaF2:Mn, and LiF:Mg,Cu,P to the deposited energy of monochromatic 1.75–3.5 keV radiation were measured with respect to an increase in the local dose due to the attenuation length that was much shorter than the TLD thickness. The responses of TLDs to X-ray emission from the laserproduced aluminium plasma were found to be independent of the dose rate within a wide range.

Time-integrated diagnostics of X-ray emission from PALS and PF 1000 : preliminary results

63%

Ryć L. , Krása J. , Juha L. , Kaczmarczyk J. , Paduch M. , Parys P. , Tomaszewski K. , Scholz M.

2001

tom Vol. 46, suppl. 1

41--43

Thermoluminescent and semiconductor detectors operating in an integrating mode have been applied to the measurement of X-ray flashes of high intensity from large plasma facilities. A detection head of special kind has been developed to perform comparison measurements with the use of the detectors of both kinds.

Energy transformation in Plasma Focus discharge with wire and liner as a load

51%

Kubeš P. , Kravárik J. , Klír D. , Scholz M. , Paduch M. , Tomaszewski K. , Karpinski L. , Ryc L. , Juha L. , Krása J. , Szydlowski A. , Romanova V.

2002

tom Vol. 47, nr 4

151-153

We present the results of experiments focused on energy transformations during the implosion of the hydrogen current sheath towards an Al wire (120 ěm in diameter) positioned on the top of the inner electrode of the PF-1000 plasma focus facility at the IPPLM in Warsaw. A wire corona is formed at the current sheath impact and ~60 ns after the impact a soft X-ray pulse is emitted. Its spectrum contains AlVI-XII lines accompanied by their satellites. The amount of emitted energy is recorded by two filtered PIN diodes and thermoluminescent dosimeters and depends on symmetry of the current sheath and quality of the current sheath focus. The mean value of energy of keV photons emitted in the runs done without the wire (~1 J) is higher than the energy obtained with the wire (~0.4 J). A time delay between the impact of the current sheath and X-ray pulse, the plasma focus dynamics and soft X-ray emission are interpreted by an axial magnetic field generation and transformations.