Dec-07-1999

To address the issue of the signal lost

1. Test of higher Wb ~ 80keV

2. Put a 200MOhm resistor from the extractor to the ground

3. Partially open and close the shutter to test the influence of the UV effect

Dec-12-1999

Make a quick-dirty array detector to put on the 4.5" port.

Dec-15-1999

1. Put a one inch aperture under the BPM

2. Change the ion source

Dec-16-1999

1. Repeat test of dec-07-1999. But the I/V's gain is changed to 10^-5 instead of 10^-6.

2. The primary ion beam signal is clearly seen on the sweep plates detectors.

3. Repeat the tests at lower Wb.

Dec-17-1999

1. Test the beam at accel-accel mode.

2. Remove the resistor string between the Pierce and the extractor.

3. Try shorting part of the accelerator's column. Improvement?

4. Change the rectifier on the Pierce stack.

5. Install the array detector on the port.