MainPage:Nuclear:Summer2017:Blessed

Commissioning of a crystal drawing system

Abstract

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Introduction

Lead Tungsten crystals have been found to be very effective in particle energy measurements and thus, the continuous developments in nuclear physics. This is because the crystals have have favorable properties such as:

Description of the crystal drawing apparatus

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Calibration of the accelerometer

In order to perform vibration studies, we need to calibrate the equipment that will be used to measure any vibration of the apparatus caused by the rotation. Here, we will use an accelerometer. The accelerometer measures proper acceleration and can be calibrated using known values of the gravitational acceleration on the surface of the earth. The hardware for this includes an Adruino board and an ADXL3xx accelerometer.

Vibration Studies

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Initial setup to calibrate the accelerometer

calibration of the accelerometer:

misalignment angle measured gravity deviation percentage

2.26245953203 degrees, 9.80764530293 m/s^2, 0.0816326530612 % for the x-axis

2.11138229046 degrees, 9.80665779414 m/s^2, 0.0714285714286 % for the y-axis

1.88511051001 degrees, 9.80530664911 m/s^2, 0.0510204081633 % for the z-axis

Initial result using the calibrated accelerometer sensor and the assembled mechanical setup of the crystal drawing prototype. The coordinate system is such that the z-axis and x-axis get to be parallel with gravity, while the y-axis is parallel to the shaft. The sampling rate was 100ms and the rotation setting was 3

Rotation Studies

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Calibration of the load cell

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