A linear temperature controller and a cryostat have been developed to measure thermally stimulated current (TSC) in CdS, a-Si:H and CdTe in order to determine the trapping characteristic. In this paper, the temperature controller and the cryostat are described in detail. In addition, TSC spectra, at five different heating rates, for a CdS thin-film sample recorded with the developed system are given, The system controls the linear heating of a sample at temperatures between about 100 K and 373 K. The temperature controller is based on an Intel 8052 microprocessor which contains a full BASIC interpreter. The monitor program of the controller is developed through a BASIC emulator, and is stored on an EPROM. For performance testing of the system, the temperatures on the experimental area are monitored during heating. The deviations from linearity were measured to be only 0.01 K s-1 for slow heating rates.


An instrument for the high temperature measurement of the Seebeck coefficient and electrical resistivity
GÜNEŞ, Murat; Parlak, Mehmet; Ozenbas, Macit (IOP Publishing, 2014-05-01)
A system for the simultaneous measurement of thermoelectric power and resistivity of one and/ or two samples over a temperature range of 300-1000 K in a vacuum chamber is designed and implemented. A sample probe is developed to provide its easy mounting and usage. In addition, two samples can be measured at the same time. Measurement accuracy has been enhanced by beadless thermocouples and micro-heaters that are specifically designed in order to minimize the 'cold-finger effect' and to eliminate some possib...
A new wireless asynchronous data communications module for industrial applications
EGE, Yavuz; Sensoy, Mehmet Gokhan; Kalender, Osman; Nazlibilek, Sedat; Citak, Hakan (Elsevier BV, 2013-10-01)
All the sensors such as temperature, humidity, and pressure used in industry provide analog outputs as inputs for their control units. Wireless transmission of the data has advantages on wired transmission such as USB port, parallel port and serial port and therefore has great importance for industrial applications. In this work, a new wireless asynchronous data communications module has been developed to send the earth magnetic field data around a ferromagnetic material detected by a KMZ51 AMR sensor. The ...
A highly sensitive atomic force microscope for linear measurements of molecular forces in liquids
PATİL, S; MATEİ, G; DONG, H; HOFFMANN, PM; Karakose, M; Oral, Ahmet (AIP Publishing, 2005-10-01)
We describe a highly improved atomic force microscope for quantitative nanomechanical measurements in liquids. The main feature of this microscope is a modified fiber interferometer mounted on a five axis inertial slider which provides a deflection sensitivity that is significantly better than conventional laser deflection based systems. The measured low noise floor of 572.0 fm/root Hz provides excellent cantilever amplitude resolution. This allows us to operate the instrument far below resonance at extreme...
On the performance of curvature stabilization time stepping methods for double-diffusive natural convection flows in the presence of magnetic field
Cibik, Aytekin; Eroglu, Fatma G.; Kaya Merdan, Songül (Springer Science and Business Media LLC, 2021-01-01)
© 2021, Springer Science+Business Media, LLC, part of Springer Nature.This paper considers analytically and numerically the curvature-based stabilization method for double-diffusive natural convection flows in the presence of magnetic field. Unconditionally stable and optimally accurate second-order approximations are obtained. The impact of curvature stabilization on different flow fields are presented for several numerical test problems.
A new method to measure viscosity and intrinsic sound velocity of liquids using impedance tube principles at sonic frequencies
Mert, Behiç; Campanella, OH (AIP Publishing, 2004-08-01)
The attenuation of the sound energy produced by a liquid contained in a cylindrical tube (wave guide) depends on the liquid's viscosity, sound frequency, tube wall thickness, and tube material. By measuring the acoustic impedance of plane sound waves in a cylindrical wave guide, one can obtain the liquid's viscosity. Impedance measurements can also provide sound velocity in the liquid medium as another important physical characteristic. In this study a method using the impedance tube technique is presented....
Citation Formats
S. OZDEMIR, A. DEMIRBAS, and E. OZAVCI, “A NEW CRYOSTAT AND TEMPERATURE CONTROLLER FOR TSC MEASUREMENTS,” MEASUREMENT SCIENCE AND TECHNOLOGY, pp. 293–299, 1993, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66943.