Monday, July 22, 2013, 15:00

Target container is coated with TaC - this container will be used for UCx#7.

Container is wrapped with 3 layers of Ta, including the back-block.

For the sintering process:

TGHT will be ramped up to 580A at 0.2A/min

TBHT will be ramped up to 230A at 0.2A/min.

Chamber has been pumped down.  HS cooling H2O valves are opened, and no leaks are detected. 

Currently IGP1 @ 7.03e-6 Torr. 

 Monday, July 22, 2013, 15:19

TGHT/TBHT was stepped up to 20A.  Pressure increased to ~1.2e-5 Torr.

Auto-ramping initiated...

 Wednesday, July 24, 2013, 18:40

TGHT and TBHT have reached to 580A/230A, respectively.  Target has been heated for ~4 hours at that max current.

Vacuum currently at 1.65e-6 Torr.

Auto-cooling initiated... (TGHT @ -1A/min, TBHT -0.5A/min)

Target will be vented in air tomorrow.

Laura Lambert wrote:

Monday, June 17, 2013, 16:57 Target is loaded with 510 SiC discs Container was previously coated with TaC and sintered SiC is wrapped with tantalum heat shield Chamber is currently being pumped down

 Tuesday, June 18, 2013, 16:16

HS water valves opened; no leaks were detected.

IG @ 8.9e-7 Torr.

Note: This target has a regular end cap inserted on one end, and the other with a D-cap. 

TGHT will be heated up to 820A and TBHT to 300A; ramping rate at 1A/min.

Stepped up TGHT/TBHT to 60A.  Vacuum slowly increasing... 

 Tuesday, June 18, 2013, 17:55

Stepped up TGHT/TBTH to 80A.  10 mins later, pressure went beyond the limit and tripped of the p/s.  F!

Allowed vacuum to come down below 8e-5 Torr.  Stepped down TGHT/TBHT to 50A.

Currently IG @ 4.8-5 Torr. 

Initiated auto-ramping:  setting: Good Vac = 3e-5 Torr, Bad Vac = 4.0e-5 Torr. 

 Thursday, June 20, 2013, 06:21

About 10 min ago, Evap tripped off due to high vacuum. 

Vacuum came back down below the trip limit and both TGHT/TBHT p/s were stepped down to 40A and turned back on.

Changed auto ramping rate to 05A/120min.  

The process continues...  (And I'm going back to sleep!) 

 Friday, June 21, 2013, 15:19

Vacuum is close to the trip limit. 

Change the ramping rate to 0.2A/120min. 

 Monday, June 24, 2013, 17:04

Organic burnt out is complete and vacuum has come down to ~9.0e-6 Torr.

Increase ramping rate to 0.2A/60min - The sintering process should take about another 2 days if everything goes smoothly. 

 Wednesday, June 26, 2013, 17:29

TGHT & TBHT have reached to 820A and 300A, respectively, for 4 hours.

Vacuum is at 9e-7 Torr. 

Cooling down is in progress, at a rate of 1.0A/min for TGHT and 0.5A/min for TBHT.

The target will be ready to come out by tomorrow.

 Thursday, June 27, 2013, 11:02

TGHT/TBHT reached to 0A.  Vacuum is leveled at 1.2e-7 Torr. 

Chamber will be vented in air soon.

Monday, June 17, 2013, 16:57

Target is loaded with 510 SiC discs

Container was previously coated with TaC and sintered

SiC is wrapped with tantalum heat shield

Chamber is currently being pumped down

Tuesday, May 28, 2013, 17:36

The target containers endcaps were coated with TaC solution and let dry. 

Each cap is wrapped with a small piece of graphite foil and inserted in the target boat.

The chamber is currently being pumped down. 

The HS cooling water valve will be opened tomorrow; any leak will be inspected.

When the vacuum is good,  TGHT will be ramped up to 580A. 

 Wednesday, May 29, 2013, 17:06

HS water valve was opened early this morning; no leaks were detected.

TGHT has stepped up to 50A.  IG is currently at 2.0e-6Torr. 

Initiated auto-ramping at 1.0A/min.

 Thursday, May 30, 2013, 11:12

TGHT reached to 580.  The end caps have been heated at that current for more than 7 hrs.

IG is coming down, currently at 8e-7 Torr.

Auto-cooling initiated, ramping down at 2A/min .

Tuesday, May 14, 2013, 17:04

Target oven is coated with TaC, and wrapped with 3-Ta heat shields.

TGHT and TBHT will be ramped up to 820A and 300A, respectively.

Ramping rate set to 1A/min.

Good Vac at 3.e-5 Torr, Bad Vac @ 4.0e-5 Torr.

Chamber is currently being pumped...

 Wednesday, May 15, 2013, 10:56

Chamber has pumped down to 4.5e-7 Torr. 

HS cooling water valves opened; no leaks were detected.

Stepping up TGHT/TBHT to 80A; monitoring vacuum.

 Wednesday, May 15, 2013, 11:26

Pressure is increasing.  TGHT setpoint @ 80A, readback @ 88.6A/0.603V, local @ 83A/0.80V.

 Wednesday, May 15, 2013, 12:08

TGHT/TBHT stepped up to 140A and tripped off at high limit vacuum.

Restarted p/s and set TBHT/TGHT at 100A

Initiated auto ramping...

 Friday, May 17, 2013, 11:39

TGHT and TBHT reached to 820A and 300A, respectively.  Target has been heating at the max currents for ~12hrs. 

Vacuum is coming down to 4.3e-7 Torr. 

The TaC coating sintering is completed.

Autocooling is initiated.  TGHT ramping rate @ 2A/min, and 1A/min for TBHT.

Wednesday, May 22, 2013, 10:43

Sintering complete.

Chamber will be vented

Nikita Bernier wrote:

Nikita Bernier wrote:  Tuesday, May 07, 2013, 16:48   5 BeO pellets were made.  Each weights about 1.3 g (including org mass).  A piece of Re foil (0.002" thick) is used as the under layer to protect the reaction between Be(g) and the Ta-boat.  (see Attachments) Another layer of Ta-foil is used as the heat-shield to wrap around the Ta-boat. The chamber was pumped down.  TGHT will be ramped up to 600 A (~1360°C) at 0.2 A/min. The vacuum limit parameter was set for good vacuum at < 3.0e-5 Torr and bad vacuum at > 4.0e0-5 Torr. The pressure, voltage and current will be closely monitored.  If the Ta-boat survives, the TGHT will continue to ramp up to max 800 A (~1580°C).    Monday, May 13, 2013, 12:48   TGHT has been at 600 A for about 13 hours with stable very low vacuum (10^-7). See Attachment #1. Temperature measurement has been lost on Saturday. Last measurement was was above 1350°C, at around 480 A. TGHT was ramped down at 1 A/min. The chamber will be vented later today. The pellets and the thermocouples will be inspected.

 Monday, May 13, 2013, 17:21

The following table shows the characteristics of the pellets after sintering at 600 A for 13 hours.

Sample,   Mass (g),   Thickness (mm),   Density (g/cm3),    Diameter (mm)

1    0.8904 4.875 1.364 13.058

2    0.8991 4.744 1.396 13.148

3    0.8846 4.579 1.482 12.884

4    0.9142 4.981 1.254 13.650

5    0.9022 4.978 1.250 13.586

Avg 0.8981 4.831 1.345 13.265

Nikita Bernier wrote:

Tuesday, May 07, 2013, 16:48   5 BeO pellets were made.  Each weights about 1.3 g (including org mass).  A piece of Re foil (0.002" thick) is used as the under layer to protect the reaction between Be(g) and the Ta-boat.  (see Attachments) Another layer of Ta-foil is used as the heat-shield to wrap around the Ta-boat. The chamber was pumped down.  TGHT will be ramped up to 600 A (~1360°C) at 0.2 A/min. The vacuum limit parameter was set for good vacuum at < 3.0e-5 Torr and bad vacuum at > 4.0e0-5 Torr. The pressure, voltage and current will be closely monitored.  If the Ta-boat survives, the TGHT will continue to ramp up to max 800 A (~1580°C).

 Monday, May 13, 2013, 12:48

TGHT has been at 600 A for about 13 hours with stable very low vacuum (10^-7). See Attachment #1.

Temperature measurement has been lost on Saturday. Last measurement was was above 1350°C, at around 480 A.

TGHT was ramped down at 1 A/min.

The chamber will be vented later today. The pellets and the thermocouples will be inspected.

 Tuesday, May 07, 2013, 16:48

5 BeO pellets were made.  Each weights about 1.3 g (including org mass). 

A piece of Re foil (0.002" thick) is used as the under layer to protect the reaction between Be(g) and the Ta-boat.  (see Pictures)

Another layer of Ta-foil is used as the heat-shield to wrap around the Ta-boat.

The chamber was pumped down. 

TGHT will be ramped up to 600 A (~1360°C) at 0.2 A/min. The vacuum limit parameter was set for good vacuum at < 3.0e-5 Torr and bad vacuum at > 4.0e0-5 Torr.

The pressure, voltage and current will be closely monitored. 

If the Ta-boat survives, the TGHT will continue to ramp up to max 800 A (~1580°C).

 CTL block on T/C F/T Ch 1
Supply on Ch 3
HS Return on Ch 4

Tuesday, April 30, 2013, 11:20: Roughing

Tuesday, April 30, 2013, 11:45: Turbo started

Wednesday, May 01, 2013, 08:43: Cooling water opened. Vacuum stable at 5.1E-7 T (IGP1)

Wednesday, May 01, 2013, 08:48: Ramping TGHT and TBHT to 850A and 300A at 1A/60s

Thursday, May 02, 2013, 09:10: TGHT reached voltage limit (12V) at ~780A yesterday at ~10pm. Increased limit to 12.5V and continued auto ramping. CTL block temp ~80C

Thursday, May 02, 2013, 10:08: TGHT voltage limit changed to 13V. TGHT:RDCUR goes to ~810A with TGHT:RDVOL at 12.5V. CTL block temp ~80C

Thursday, May 02, 2013, 11:33: TGHT manually stepped to 850A RDCUR at 846A, RDVOL at 13.1V. CTL block temp ~84C

Thursday, May 02, 2013, 15:13: Ramping down TGHT and TBHT to 580A and 280A at 2A/min and 1A/min

Friday, May 03, 2013, 08:30:  TGHT and TBHT at 580A and 280A. CTL block temp ~60C 

Friday, May 03, 2013, 08:37: Ramping down TGHT and TBHT to 0 at 2/min and 1A/min

Friday, May 03, 2013, 11:04: T/C logger removed

Monday, May 06, 2013, 09:37: Turbo stopped.

Monday, May 06, 2013, 10:26: Venting

Tuesd ay, April 23, 2013, 10:07

TBHT / TGHT: 820A / 300A

TGHT:RDCUR: 816.6A
TBHT:RDCRU: 303.5A

Local P/S displays
TGHT: 821A / 11.05V
TBHT: 307A / 4.37V

Tuesday, April 23, 2013, 10:45: Ramping down TBHT to 0A @ 5A/min

Tuesday, April 23, 2013, 12:49: Ramping down TGHT to 0A @ 5A/min

Tuesday, April 23, 2013, 15:52: Swithced off TGHT and TBHT P/S. TGHT P/S showed 30A read back value, while local value was 0A

 Wednesday, April 24, 2013, 09:53: Turbo stopped

Wednesday, April 24, 2013, 12:00: Target removed 

The ionizer tube was found to have deformed as seen in the attached photo.

Anders Mjos wrote:

Target installed with 4 T/C The target assembly is ITD0300 with the CTL Cu cooling block slightly modified. Ch1 - CTL cooling block T/C feedtrough Ch2 - Heat shield below left gripper arm - T/C feedthrough Ch3 - Heat shield below left gripper arm - 9 pin connector Ch4 - Target left side leg on tube - 9 pin connector Friday, April 19, 2013, 15:23: Roughing Friday, April 19, 2013, 15:41: Started turbo Monday, April 22, 2013, 09:43: Opened water supply. Vacuum stable at 2.8E-7 T (IGP1)

Monday, April 22, 2013, 18:48

Ramping TGHT/TBHT to 850A/300A at 1A/min.

Target installed with 4 T/C

The target assembly is ITD0300 with the CTL Cu cooling block slightly modified.

Ch1 - CTL cooling block T/C feedtrough
Ch2 - Heat shield below left gripper arm - T/C feedthrough
Ch3 - Heat shield below left gripper arm - 9 pin connector
Ch4 - Target left side leg on tube - 9 pin connector

Friday, April 19, 2013, 15:23: Roughing

Friday, April 19, 2013, 15:41: Started turbo

Monday, April 22, 2013, 09:43: Opened water supply. Vacuum stable at 2.8E-7 T (IGP1)

 A thermocouple feedthru was installed via 9 pin sub-D connector. It runs from the the conflat cross on the top of the evaporator to the upper 9 pin connector of the target mounting plate.

Monday, April 08, 2013, 17:39

Target container is coated with TaC; the container will be used for the UCx#6 target. 

No Ta-heat shields are used.

For the sintering process:

TGHT will be ramped up to 580A at 0.2A/min

TBHT will be ramped up to 230A at 0.2A/min

Chamber has been pumped down.  HS cooling H2O valve opened; no leaks have detected.

Thursday, April 11, 2013, 14:35 

Target and tube heaters have reached to optimum.

Auto-cooling initiated...

 Friday, April 12, 2013, 11:17

P/S off.  Chamber vented. 

Done!

Thursday, March 12, 2013 

The CTL was removed and target heated to 580A / 300A

T1: Left target leg close to tube
T2: Heat Shield above CTL
T3: Heat Shield cooling water Supply
T4: Heat Shield cooling water Return

Thursday, March 13, 2013  

The target was cooled down 

Results attached as PDF and Excel

Wednesday, March 13, 2013 

Thermocouple channels (see attached PDF for photos)
T1 - Left target leg at tube
T2 - Between cooling fins close to tube, left side
T3 - Supply water HS
T4 - Return water HS

Friday, March 22, 2013

Test not conducted. Target removed.

Anders Mjos wrote:

Anders Mjos wrote: Wednesday, March 06, 2013 The Cool Transfer Line (CTL) test target is installed for thermal tests. Drawing number is ITD0431 REV A. Thermocouple channels are as follows: T1: Cu block on CTL T2: Heat Shield above CTL T3: Heat Shield cooling water Supply T4: Heat Shield cooling water Return Cooling water is in Evap2 supplied to the cooling line that goes directly to the area on the Heat Shield above the CTL.   Monday, March 11, 2013 The CTL test target was installed again for a second thermal test. CTL block fastened to HS with 1 in lbs. A small piece of Ta-foil of 0.001" thickness was used between the CTL Cu-block and the Ta transfer line to reduce the heat transfer.. Thermocouples were re-attached to CTL and Heat Shield (see above for channels #s).

 Monday, March 11, 2013, 15:55

Chamber was pumped down to 2 e-7 Torr.  HS water valve opened and no leaks were detected.  

TGHT and TBHT are ramping up to 850A and 300A at 2A/min, respectively.  

RGA is running... 

Tuesday, March 12, 2013, 10:44  

TGHT/TBHT reached to max currents. 

See attachment #1 for temperature and RGA measurements. 

Cooling down in process... 5A/min. 

Monday, March 11, 2013

The CTL test target was installed again for a second thermal test. CTL block fastened to HS with 1 in lbs. A small piece of Ta-foil of 0.001" thickness was used between the CTL Cu-block and the Ta transfer line to reduce the heat transfer..

Thermocouples were re-attached to CTL and Heat Shield (see above for channels #s).

See attached graph (PDF) for details.

Anders Mjos wrote:

Wednesday, March 06, 2013 The Cool Transfer Line (CTL) test target is installed for thermal tests. Drawing number is ITD0431 REV A. Thermocouple channels are as follows: T1: Cu block on CTL T2: Heat Shield above CTL T3: Heat Shield cooling water Supply T4: Heat Shield cooling water Return Cooling water is in Evap2 supplied to the cooling line that goes directly to the area on the Heat Shield above the CTL.

 Wednesday, March 06, 2013, 17:23

The target has been pumping down to 5.3 e-7 Torr.  On the RGA mass scan, mainly H2O (mass 18 + constituents) was detected at ~2.7pA (see attachment #1).

The target will be heated up: TGHT = 850A (rate @ 1A/min); TBHT = 300A (rate @ 1A/min).

 Thursday, March 07, 2013, 11:51

TGHT and TBHT reached to 850A (local, 845A\13.80V) and 300A, respectively.  The out gassing of CO (mass 28) reached to ~5pA at the max currents.  (see attachment #2) 

 TBHT will be ramped down to 0A to compare the temperatures.  

 Thursday, March 07, 2013, 15:55

TBHT at 0A.  See attachment#3 for the temperatures and RGA data before further ramping down the TGHT.

Wednesday, March 06, 2013

The Cool Transfer Line (CTL) test target is installed for thermal tests. Drawing number is ITD0431 REV A.

Thermocouple channels are as follows:

T1: Cu block on CTL
T2: Heat Shield above CTL
T3: Heat Shield cooling water Supply
T4: Heat Shield cooling water Return

Cooling water is in Evap2 supplied to the cooling line that goes directly to the area on the Heat Shield above the CTL.

Test results attached.