Beam power absolute measurements using the calorimetric method

V. P. Kudrya

doi:10.1117/12.2624099

30 January 2022 Beam power absolute measurements using the calorimetric method

V. P. Kudrya

Proceedings Volume 12157, International Conference on Micro- and Nano-Electronics 2021; 121571P (2022) https://doi.org/10.1117/12.2624099
Event: International Conference on Micro- and Nano-Electronics 2021, 2021, Zvenigorod, Russian Federation

Abstract

Mathematical models for three types of beam power calorimeters that do not require calibration are considered. These types are: adiabatic, with a calibrated heat sink, and based on water-flow cooling. For the adiabatic type a transient solution of the corresponding heat transfer equation is presented and its features are considered. Two definitions of the response time are proposed. The question of determining its sensitivity is considered. Based on these definitions, a solution to the problem of the receiving plate material optimal choice in terms of the ratio of sensitivity and response time is proposed. For the type with a calibrated heat sink a simple lumped parameters model is considered. Based of this model estimations of the calorimeter sensitivity and response time were made. For the water-flow type some analytical results following from equations describing its operation within the framework of a quasi-one-dimensional thermal model are presented. A consistent simplification of these equations is considered, which made it possible to obtain simple relationships for assessing the sensitivity, response time, and heating temperature of the receiving plate. A thermal energy balance equation for the stationary mode of operation is obtained. Within the framework of the proposed approach, a rough estimate of the lower boundary of the response time of the water-flow calorimeter was obtained. Wherever possible, comparisons have been made with published experimental and theoretical results. The results obtained can be used for development and design of calorimetric diagnostics systems of fast neutral particle beams.

Citation Download Citation

V. P. Kudrya "Beam power absolute measurements using the calorimetric method", Proc. SPIE 12157, International Conference on Micro- and Nano-Electronics 2021, 121571P (30 January 2022); https://doi.org/10.1117/12.2624099

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KEYWORDS

Liquids

Calibration

Tin

Temperature metrology

Performance modeling

Metals

Optical testing

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