a calorimetric probe 报告人：肖家鑫...

A calorimetric probe

报告人：肖家鑫成员：邹云鹏、吴一帆、吴樑、耿康宁、肖家鑫

A calorimetric probe

• A high-temperature calorimetric probe was shown to be a reliable method of measuring temperatures in argon and helium plasma jets in the range 2000 to 10 000 K.

• A calorimetric probe for plasma diagnostics is presented, which allows measurements of the power taken by a test substrate.

References: A calorimetric probe for plasma diagnostics Marc Stahl, Thomas Trottenberg, and Holger KerstenaA Plasma Calorimetric Probe S. Katta, J. A. Lewis·, and W. H. Gauvint

Probe structure

Fig1:Sketch of the calorimetric probe

Reference:A calorimetric probe for plasma diagnostics Marc Stahl, Thomas Trottenberg, and Holger Kerstena

Fig2:Schematic of the experimental setup for the calibration of the calorimetric probe by electrons as a known power source.


CALORIMETRIC METHOD• The principle for measuring the incoming power is based on the rate of

change in the temperature of a test substrate, dTS / dt, which implies measuring the temperature characteristic of the heating process when the probe is exposed to an energy flux and the following cooling without this energy flux. The change in the heat content enthalpy （热函） HS of the test substrate can be described by:

(1) where CS is the effective heat capacity of the substrate including the

connected wires and the interaction with the holder.说明：焓是物体的一个热力学能状态函数，即热函；焓是一个状态函数，

也就是说，系统的状态一定，焓的值就定了。


• The balance of power during the heating process is given by ：

（ 2 ）

and during the cooling process by ：

（ 3 ）


• If the incoming power Pin is constant during the heating process and the heat loss Pout (TS )is only a function of the substrate temperature, the incoming power can be calculated by subtracting Eq. 3 from Eq.2 for each temperature TS measured during the heating (TS, h =TS )and the following cooling processes( TS, c =TS) ：

• (4)


Example of use for the calorimetric probe


谢谢

a calorimetric probe 报告人：肖家鑫...

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