ppt working principle of pulse tube refrigerator

Abstract

The working fluid for the pulse tube refrigerator is Helium, which is non-toxic to humans and harmless to the environment. The Pulse Tube Refrigeration unit offers a viable alternative to units that currently require CFC and HCFC working fluids. Pulse Tube Refrigerators can be operated over wide range of temperatures. These units can be used in numerous space and commercial applications, including food freezers freeze dryers. It can also be used to cool detectors and electronic devices ....etc

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ABSTRACT

The thrust for an advanced format of data storage in optical storage media has led to the evolution of BLU-RAY DISC (BD). Blu-ray, also known as Blu -ray Disc (BD) is the name of the next- generation optical disc format and is the successor of present generation optical discs (2nd generation) like CD's, DVD s HD-DVD s. The Blu ray technology has changed the very definition of optical storage media by phenomenally improvised technology. Gone are the days when the ....etc

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Cathode ray oscilloscope: Cross ray oscilloscope, ie CRO is an instrument used to test and observe the constantly changing signal voltages. Usually, it gives a two-dimensional frame of one or more parallel signals as a function of time. CRO device has many applications mainly in electronics and electric. The cathode ray oscilloscope has fast processing and traces the X-Y pattern at a very fast rate.In fact, the cathode ray oscilloscope is very fast X-Y plotters that can display an input signal as a function of time or other signal.
CRO Princi ....etc

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Cathode Ray Oscilloscope

Information given by oscilloscopes

Time and voltage
Frequency and phase
DC and AC components
Rise and fall time
Mathematical analysis ....etc

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Introduction

The earliest version of the CRT was invented by the German physicist Ferdinand Braun in 1897 and is also known as the Braun tube. It was a cold-cathode diode, a modification of theCrookes tube with a phosphor-coated screen.

A cathode ray tube is a vacuum tube which consists of one or more electron guns, possibly internal electrostatic deflection plates, and a phosphor target. In television sets and computer monitors, the entire front area of the tube is scanned repetitive ....etc

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RUBY CHAUDHARY



INTRODUCTION
Invented by German scientist Karl Ferndinand Braun in 1897.
He introduced CRT with Fluorescent screen and named it as CRO.
Consist of Cathode Ray Tube(CRT)

CRTs operates well in voltage range of 2-5 kv

Popular instrument to show time, voltage both DC and AC. Shows Volts / Time.
Display waveforms.
Opetares on Voltages.
Very fast X-Y Plotter
Movement of luminous spot in response to Input Voltage traces waveform w.r.t Time .

Cathode Ray Oscilloscope
....etc

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