Laura Lambert wrote:

Thursday, February 18, 2016, 15:34 Target container was previously coated with TaC spray and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block - same method as for sintering TaC coating [new wrapping method-see elog112 eva2]. The target consists of 244 discs of UCx with 7.8cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Friday, February 19, 2016, 08:28 IG1 = 4.7e-6 Torr Tapped up manually to 35A. Waited ~1hr, vacuum stable IG1 = 3.8e-6 Torr. Initiating auto-ramp.

 Friday, February 26, 2016, 10:26

Target has been heated at 520A for 10 hrs.

Vacuum at 5.3e-6 Torr. 

Initiated cool down at 1A/min. 

Remember to vent with Ar. 

John Wong wrote:

Laura Lambert wrote:  Thursday, February 18, 2016, 15:34 Target container was previously coated with TaC spray and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block - same method as for sintering TaC coating [new wrapping method-see elog112 eva2]. The target consists of 244 discs of UCx with 7.8cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Friday, February 19, 2016, 08:28 IG1 = 4.7e-6 Torr Tapped up manually to 35A. Waited ~1hr, vacuum stable IG1 = 3.8e-6 Torr. Initiating auto-ramp.    Friday, February 26, 2016, 10:26 Target has been heated at 520A for 10 hrs. Vacuum at 5.3e-6 Torr.  Initiated cool down at 1A/min.  Remember to vent with Ar.

 Monday, February 29, 2016, 16:15

Vented in Ar.

Target removed from evap1 this morning.

Currently sitting in glovebox.

Weird red discharge on the end of the right side, inside the container [wrt ionizer tube into page] - same side with no endcap during carbonization.

Materials look good, both endcaps inserted.

Rh foil still needs to be implanted.

 Wednesday, March 02, 2016, 10:13

The discoloration appears to be a simple change in the morphology of the TaC coating, future tests would need to be done to confirm this estimation.

This should not effect the container/ target.

See photo attached.

 Wednesday, May 18, 2016, 15:05

Target container was previously coated with TaC spray and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block - new wrapping method-see elog112 evap2

The target consists of 200 discs of UCx with 7.4cm in length [4 packs of 5 + 180 single discs].

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

The chamber is currently pumping down.

TGHT will be ramped up to 460A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog291 evap2]

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

 Thursday, May 19, 2016, 09:25

IG1 = 3.4e-6 Torr

Tapped up manually to 35A

Vacuum stable.

IG1 = 3.5e-6 Torr.

Initiating auto-ramp.

 Wednesday, May 25, 2016, 13:05

Target has been heated at 460A, 4.5V for 5 hrs.

Vacuum at 6.4e-6 Torr. 

Initiated cool down at 1A/min. 

 Friday, May 27, 2016, 11:14

UCx done.

Vented in Ar and put in glove box yesterday.

Looked inside before inserting 2nd endcap - clean view all the way through the materials to the endcap/ not much visible shifting.

Ta coated spring helped hold materials in place.

Slightly darker markings on legs of container on side that was open in evap1.

2nd endcap put in.

Ready for assembly.

 Tuesday, June 30, 2015, 13:28

Target container was previously coated with TaC spray and sintered.

It's is wrapped with 3 layers of Ta-heat shield, including the center block.

The target consists of 221 discs of UCx with 7.3cm in length.

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring.

The chamber is currently pumping down.

TGHT will be ramped up to 520A at 0.1A/min

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

 Tuesday, June 30, 2015, 14:43

IG1 = 1.8e-5 Torr.

Tapped up manually to 30A.

Vacuum stable; IG1 = 1.2e-5 Torr.

Initiating auto-ramp.

 Thursday, July 02, 2015, 08:41

EVAP1 was tripped off due to backflow preventer test this morning.

IG1 - 4.2e-6 Torr.

Tapping back-up manually before re-initiating auto-ramp.

 Thursday, July 02, 2015, 11:49

Tapped up manually to 85A, 0.65V

IG1 = 3.6e-6 Torr.

Initiating auto-ramp.

 Friday, July 03, 2015, 14:47

All water valves look good, flow is good.

WV turned back on, TGHT turned back on. 

Tapped back up manually to 20A.

IG1 = 2.3e-6 Torr

Initiating auto-ramp at 0.1A/min with a max setpoint of 150A over the weekend.

Will continue to ramp up monday.

Approved by Peter Kunz.

Laura Lambert wrote:

Tuesday, June 30, 2015, 13:28 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 221 discs of UCx with 7.3cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring. The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Tuesday, June 30, 2015, 14:43 IG1 = 1.8e-5 Torr. Tapped up manually to 30A. Vacuum stable; IG1 = 1.2e-5 Torr. Initiating auto-ramp.  Thursday, July 02, 2015, 08:41 EVAP1 was tripped off due to backflow preventer test this morning. IG1 - 4.2e-6 Torr. Tapping back-up manually before re-initiating auto-ramp.  Thursday, July 02, 2015, 11:49 Tapped up manually to 85A, 0.65V IG1 = 3.6e-6 Torr. Initiating auto-ramp.

 Thursday, July 02, 2015, 12:58

NOTE:  Before venting the EVAP1 chamber, the Ar line must disconnect from Peter's sampling chamber (inside the fumehood) and connect back to the EVAP. 

John Wong wrote:

Laura Lambert wrote:  Tuesday, June 30, 2015, 13:28 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 221 discs of UCx with 7.3cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring. The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Tuesday, June 30, 2015, 14:43 IG1 = 1.8e-5 Torr. Tapped up manually to 30A. Vacuum stable; IG1 = 1.2e-5 Torr. Initiating auto-ramp.  Thursday, July 02, 2015, 08:41 EVAP1 was tripped off due to backflow preventer test this morning. IG1 - 4.2e-6 Torr. Tapping back-up manually before re-initiating auto-ramp.  Thursday, July 02, 2015, 11:49 Tapped up manually to 85A, 0.65V IG1 = 3.6e-6 Torr. Initiating auto-ramp.    Thursday, July 02, 2015, 12:58 NOTE:  Before venting the EVAP1 chamber, the Ar line must disconnect from Peter's sampling chamber (inside the fumehood) and connect back to the EVAP.

 Friday, July 03, 2015, 13:42

water valve tripped off at ~1pm, which subsequently tripped off the TGHT [see photo]

currently trying to figure out what caused this to occur before re-starting....

 Friday, July 03, 2015, 14:47

All water valves look good, flow is good.

WV turned back on, TGHT turned back on. 

Tapped back up manually to 20A.

IG1 = 2.3e-6 Torr

Initiating auto-ramp at 0.1A/min with a max setpoint of 150A over the weekend.

Will continue to ramp up monday.

Approved by Peter Kunz.

 Monday, July 06, 2015, 09:29

TGHT reached 150A 1.5hrs ago.

Vacuum stable.

IG1 = 2.7e-5 Torr.

Re-starting auto-ramp at 0.1A/min with a max setpoint of 520A.

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote:  Tuesday, June 30, 2015, 13:28 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 221 discs of UCx with 7.5cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring. The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Tuesday, June 30, 2015, 14:43 IG1 = 1.8e-5 Torr. Tapped up manually to 30A. Vacuum stable; IG1 = 1.2e-5 Torr. Initiating auto-ramp.  Thursday, July 02, 2015, 08:41 EVAP1 was tripped off due to backflow preventer test this morning. IG1 - 4.2e-6 Torr. Tapping back-up manually before re-initiating auto-ramp.  Thursday, July 02, 2015, 11:49 Tapped up manually to 85A, 0.65V IG1 = 3.6e-6 Torr. Initiating auto-ramp.    Thursday, July 02, 2015, 12:58 NOTE:  Before venting the EVAP1 chamber, the Ar line must disconnect from Peter's sampling chamber (inside the fumehood) and connect back to the EVAP.     Friday, July 03, 2015, 13:42 water valve tripped off at ~1pm, which subsequently tripped off the TGHT [see photo] currently trying to figure out what caused this to occur before re-starting....  Friday, July 03, 2015, 14:47 All water valves look good, flow is good. WV turned back on, TGHT turned back on.  Tapped back up manually to 20A. IG1 = 2.3e-6 Torr Initiating auto-ramp at 0.1A/min with a max setpoint of 150A over the weekend. Will continue to ramp up monday.   Approved by Peter Kunz.  Monday, July 06, 2015, 09:29 TGHT reached 150A 1.5hrs ago. Vacuum stable. IG1 = 2.7e-5 Torr. Re-starting auto-ramp at 0.1A/min with a max setpoint of 520A.

 Wednesday, July 08, 2015, 10:44

The carbonization process is complete; chamber vacuum is stabilizing at 9.5e-6 Torr. 

Currently TGHT is at 430A.  Increased TGHT ramping rate to 1A/min.  Target should be at max current (520A) in 1.5 hours, so TGHT can be ramped down around 4:30pm today. 

 Wednesday, July 08, 2015, 16:36

TGHT at 520A/5.884V for over 4 hours.  Pressure coming down, currently at 1.42e-5 Torr. 

Initiated cooling at -2A/min. 

Chamber can be vented in Ar tomorrow and the target will be inspected.

Thursday, July 09, 2015, 17:08  

The target was taken out from the evaporator and inspected. 

Some "burnt" marks on the ionization legs can be observed and also the centre support leg is bent.  (see photos#1)

Not sure if the centre leg came in bent after machining or it happened during the carbonization process??  Do not have photos of the container before the process to compare.  

A few things to note…  During the process, the power supply did tripped off twice due to the cooling water valve shut off. (see photo#2).  An assumption is that sudden cool down of the hot target might have caused the quenching effect. 

No other visible damage.  

End caps are inserted and ready for assembly.

Link to photos:  https://www.dropbox.com/sh/c1ake0fu4x7lckc/AAD0F8TVRrpCbbHquEvSkyYIa?dl=0

 Friday, October 17, 2014, 11:47

Target container was previously coated with TaC spray and sintered.

It's is wrapped with 3 layers of Ta-heat shield, including the center block.

The target consists of 255 discs of UCx with 10.5cm in length.

A regular TaC coated endcap is inserted right, wrt the ionizer tube pointing down, so the left is open with a removable half-cap to allow out-gassing.

The chamber was pumped down overnight.

TGHT will be ramped up to 520A - keep heating the current for 4-5 hours.

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

Auto ramp at 0.1A/min.

 Friday, October 17, 2014, 13:25

IG1 = 2.6e-6 Torr

Manually stepped up to 35A

Waited ~1hr15

IG1 = 4.2e-6 Torr

Initiating auto-ramp.

Laura Lambert wrote:

Friday, October 17, 2014, 11:47 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 255 discs of UCx with 10.5cm in length. A regular TaC coated endcap is inserted right, wrt the ionizer tube pointing down, so the left is open with a removable half-cap to allow out-gassing. The chamber was pumped down overnight. TGHT will be ramped up to 520A - keep heating the current for 4-5 hours. Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Auto ramp at 0.1A/min.  Friday, October 17, 2014, 13:25 IG1 = 2.6e-6 Torr Manually stepped up to 35A Waited ~1hr15 IG1 = 4.2e-6 Torr Initiating auto-ramp.

 Monday, October 20, 2014, 14:10

There were two big power bumps occurred on Saturday Oct 18 and wiped all the IOC/PLC on the Evaporators.   All the system, including TGHT/pumps/EPICS/Alarm handlers were found off.  The ion gauge was turned on this morning and showed the pressure was around 16mTorr. (see attachment).

The pump has been turned back on; pressure is currently at 3.5e-6 Torr.

Ramping up TGHT...

 Monday, November 03, 2014, 12:05

TGHT has reached to 580A and the target has conditioned at that current for about 3 days. 

Cooling down at 2A/min.

 Wednesday, November 05, 2014, 16:40

UCx conditioning complete.

Target is now in the Ar-glove box.  End caps are inserted but need to be expanded.

Need to insert Re foil prior to assembly.

John Wong wrote:

Laura Lambert wrote:  Friday, October 17, 2014, 11:47 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 255 discs of UCx with 10.5cm in length. A regular TaC coated endcap is inserted right, wrt the ionizer tube pointing down, so the left is open with a removable half-cap to allow out-gassing. The chamber was pumped down overnight. TGHT will be ramped up to 520A - keep heating the current for 4-5 hours. Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Auto ramp at 0.1A/min.  Friday, October 17, 2014, 13:25 IG1 = 2.6e-6 Torr Manually stepped up to 35A Waited ~1hr15 IG1 = 4.2e-6 Torr Initiating auto-ramp.    Monday, October 20, 2014, 14:10 There were two big power bumps occurred on Saturday Oct 18 and wiped all the IOC/PLC on the Evaporators.   All the system, including TGHT/pumps/EPICS/Alarm handlers were found off.  The ion gauge was turned on this morning and showed the pressure was around 16mTorr. (see attachment). The pump has been turned back on; pressure is currently at 3.5e-6 Torr. Ramping up TGHT...  Monday, November 03, 2014, 12:05 TGHT has reached to 580A and the target has conditioned at that current for about 3 days.  Cooling down at 2A/min.  Wednesday, November 05, 2014, 16:40 UCx conditioning complete. Target is now in the Ar-glove box.  End caps are inserted but need to be expanded. Need to insert Re foil prior to assembly.

 Monday, November 10, 2014, 13:48

UCx was being assembled, but as one of the endcaps was being expanded, the target container broke [friday nov 7th].

attempting to recover the materials and re-load into a new container now...

 Monday, November 10, 2014, 15:52

new target materials weight total [incl graphite] = 23.368g

(33.994g of materials taken out of broken target)

 Friday, January 19, 2018, 12:29

Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164]

A 14mm punch was used to punch out circles from the cast.

35 circles were packed into a graphite sample container.

35 x UO2/C circles = 5.69 g

Graphite container = 6.84 g

Graphite container is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber currently pumping down.

Marla Cervantes wrote:

Friday, January 19, 2018, 12:29 Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164] A 14mm punch was used to punch out circles from the cast. 35 circles were packed into a graphite sample container. 35 x UO2/C circles = 5.69 g Graphite container = 6.84 g Graphite container is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber currently pumping down.

 Monday, January 22, 2018, 15:48

A power outage on Sunday tripped off EVAP1.

Marla Cervantes wrote:

Marla Cervantes wrote:  Friday, January 19, 2018, 12:29 Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164] A 14mm punch was used to punch out circles from the cast. 35 circles were packed into a graphite sample container. 35 x UO2/C circles = 5.69 g Graphite container = 6.84 g Graphite container is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber currently pumping down.    Monday, January 22, 2018, 9:00 A power outage on Sunday tripped off EVAP1.

 Monday, January 22, 2018, 10:00

Chamber pumping down.

Water flow turned on.

Monday, January 22, 2018, 13:30

IGP1 = 8e-6 Torr

Tapped up entire process manually to 520A in 45 min

TGHT = 520 A, 6.08 V 

Vacuum coming down indicating carbonization process complete

Will remain at max setpoint overnight.

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote:  Friday, January 19, 2018, 12:29 Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164] A 14mm punch was used to punch out circles from the cast. 35 circles were packed into a graphite sample container. 35 x UO2/C circles = 5.69 g Graphite container = 6.84 g Graphite container is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber currently pumping down.    Monday, January 22, 2018, 9:00 A power outage on Sunday tripped off EVAP1.  Monday, January 22, 2018, 10:00 Chamber pumping down. Water flow turned on. Monday, January 22, 2018, 13:30 IGP1 = 8e-6 Torr Tapped up entire process manually to 520A in 45 min TGHT = 520 A, 6.08 V  Vacuum coming down indicating carbonization process complete Will remain at max setpoint overnight.

 Tuesday, January 23, 2018, 9:30

Initiating auto-cool at 2 A/min

 Tuesday, January 23, 2018, 16:00

 EVAP1 was not vented, Ar tank has low level, Ar tank will be replaced.

Wednesday, January 24, 2018, 11:37

 EVAP1 was vented very carefully using the Ar remaining in the Ar tank.

Ar tank remaining gas: ~8 psi.

Wednesday, January 24, 2018, 15:42 

UCx was transferred to glove box.

Final mass 4.501 g

 Thursday, November 23, 2017, 13:34

Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164]

A 14mm punch was used to punch out circles from the cast.

35 circles were packed into a graphite sample container.

35 x UO2/C circles = 5.75 g

Graphite container = 5.38 g

Graphite container is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber currently pumping down.

 Friday, November 24, 2017, 12:48

IGP1=1.3e-6 Torr

TGHT = 520A, 4.98V 

Vacuum went down indicating carbonization.

Will remain at max setpoint for the weekend.

 Monday, November 27, 2017, 09:58

IG1 = 2.6e-6 Torr

TGHT = 520A, 5.1V

Carbonization complete in 3 hrs and 30 min.

Initiating auto-cool at 2.0A/min

 Wednesday, November 27, 2017, 13:10

 IEVAP was vented in argon and sample removed/transferred to glove box on Friday.

Laura Lambert wrote:

Marla Cervantes wrote:  Wednesday, January 10, 2018, 14:44 Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164] A 14mm punch was used to punch out circles from the cast. 35 circles were packed into a graphite sample container. 35 x UO2/C circles = 5.75 g Graphite container = 5.38 g Graphite container is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber currently pumping down.  Friday, January 12, 2018, 07:43 IGP1 = 0.0266 Torr TGHT = 520A, 5.92V Voltage has been climbing consistently since it has reached it's max setpoint, gone up ~0.8V in ~18hrs Carbonization complete. Initiating auto-cool at 2.0A/min Will update later with more information on this process.  Friday, January 12, 2018, 09:47 Turned the turbo pump back on, to ensure safe cooling.

 Monday, January 15, 2018, 10:00

Vented with Argon and removed from evap1

NB: The initial mass of the UO2/C discs was 5.9 g

       The final mass of the UCx discs was 4.614 g

 Monday, January 29, 2018, 09:26

35 circles of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 4.94 g

Graphite container = 5.03 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

Marla Cervantes wrote:

Monday, January 29, 2018, 09:26 35 circles of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 4.94 g Graphite container = 5.03 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.

 Monday, January 29, 2018, 11:06

A power outage around 10 am tripped off EVAP1.

Marla Cervantes wrote:

Marla Cervantes wrote:  Monday, January 29, 2018, 09:26 35 circles of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 4.94 g Graphite container = 5.03 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.    Monday, January 29, 2018, 11:06 A power outage around 10 am tripped off EVAP1.

 Monday, January 29, 2018, 14:22

Water flow turned on.

Chamber set to pumping down. 

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote:  Monday, January 29, 2018, 09:26 35 circles of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 4.94 g Graphite container = 5.03 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.    Monday, January 29, 2018, 11:06 A power outage around 10 am tripped off EVAP1.  Monday, January 29, 2018, 14:22 Water flow turned on. Chamber set to pumping down.

 Tuesday, January 30, 2018, 16:06

Initial IGP1 = 9.4x10e-7 Torr

Tapped up entire process manually to 520A in 32 min

TGHT = 520 A, 5.45 V

Vacuum coming down indicating carbonization process complete 

Will remain at max setpoint for 4 hrs to ensure full carbonization before cooling down.

 Tuesday, January 30, 2018, 18:40

 Initiating auto-cool at 2.0 A/min 

 Wednesday, January 31, 2018, 14:00