Friday, January 11, 2013, 13:52

TEST#1

A new target boat is coated with TaC and will go through the sintering process at 580A (max).  Ramping rate 5A/20min.

For this test, two thermocouples are installed to measure the temperature of the container.  The QMS is also operating to analyze the gases. 

See attachment#1 for the thermocouple setup.  Note:  No Ta heat shield is used to wrap around the target container.  

See attachment#2 for an example of the QMS and temperature measurements.  

More details about the results later...  

Tuesday, January 22, 2013, 12:19  

The test was successfully complete. 

Short summary of the results: 

1.  A significant difference in the temperature dependence on the heater current could be found when ramping up/down (see attachment #3). 

2.  A difference of 200 C at the highest temperature was between the two thermocouples were measured. 

3.  The measured temperatures are lower than previous measurements with a pyrometer on an empty LP target container (see attachment#3).

4.  RGA spectra show most of the higher mass organic molecules are gone after initial heating at low temperature.  

5.  Above 560A, CO2 shows up again and decreases up to about 680A heating current. (see attachment #4).

6.  After running at high temperature for some time, only H2O & CO and their constituents are left.  (see attachment #5).

Data can be found on my dropbox, folder "RFQ-test\Test#1-ver1.0"

Next:  Re-heating the target

Tuesday, February 12, 2013, 17:10 

TEST#2: Re-heating the target again.  See if it fit the curves. Measuring concentrations of 14N, 16O, 18H2O, 28CO, 32 CH3OH, 40Ar, 44C02. 

Ramping rate 1A/min

Wednesday, March 06, 2013, 18:14 

Test#2 complete.  Data can be found on my dropbox, folder "RFQ-test\Test#2-ver1.0"

Wednesday, March 06, 2013, 18:14 

Test#3:  RFQ target container_version 2.0, thermal test.

Measuring back block temperature & analyze gases.  

Data can be found on my dropbox, folder "RFQ-test\Test#3-ver2.0"