2017-08-15

• It appears to me that the major factor limiting the improvement of the modes that either remain equal or diminish is that the original design was already quite good at exciting those modes. As can be seen in the attached plots, the original design is about as well centered over the 5 modes as a rectangle on the x axis can be. As a result, maintaing a constant potential on the ESD it would be difficult to improve the coupled force without specifically tailoring the force profile to a certain mode.
• In order from left to right, the frequencies of the given modes are 14.2 kHz, 16.2 kHz, 16.3 kHz, 23.8 kHz, and 27.4 kHz.

We laser polished S1600546, 547, 548, 549, 550 and 551

Fixed the 307 gauge controller (a missing contact on the rair panel). The low pressure gauge was connected to 1G port and has measured 1.7E-6 torr. We are not sure since how long the turbo was operating (no vacuum logger yet).

Installed a gate valve between the roughing and tubbo pump. See below a pump down curve. The convection gauge is not calibrated. the turbo started at 14th min (at about 3 torr)

At 5pm the pressure was 6.5e-6 torr.

Checked again at:

• 9am, pressure was 2e-6 torr
• 11:30am, pressure was 1.5e-6 torr
• 5pm, pressure was 1.4e-6 torr

Please see prosidures for pumping down and venting with air for the test vacuum chamber here https://dcc.ligo.org/T1600304

Ordered the clean room (hardware+hepa filters) and vacuum gauges

Annealing run (447-448) on 3" wafers - Crime 10/27/2016 https://dcc.ligo.org/T1600485-v1

Annealing run (454-459) on 3" wafers - Crime 11/02/2016 https://dcc.ligo.org/LIGO-T1600510

Annealing run (460-465) on 3" wafers - Crime 11/04/2016 https://dcc.ligo.org/T1600513-x0

Microscope inspection of samples:

S1600487  https://dcc.ligo.org/S1600487-v7

S1600438 https://dcc.ligo.org/S1600438

Started annealing run Annealing run (489-490) on 3" wafers - Crime 01/18/2017 https://dcc.ligo.org/T1700027 using new hardware

The new chamber was build. The first attempt to pump down was unsuccessful because of dislocated lid. After the lit was placed properly, the chamber was pumped down to 0.1 torr within 8 min. In future a sky hook will be used to help placing the lid properly. The clamps should not be placed on the lid before the roughing pump turned on.

The turbo pump controller failed. Error code 698 – call the vendor.

Turbo pump controller (new chamber) was configured. Need to reduce the frequency or setup a standby mode. First pump down: E-7 range reached within about an hour. See plot: blue - old crime chamber, pink - new crime chamber.

 Started Annealing run (491-496) on 3" wafers - Crime 01/20/2017 https://dcc.ligo.org/LIGO-T1700036 Will be done by Monday

Started an annealing run https://dcc.ligo.org/LIGO-T1700271

Will be ready by Friday morning

Started annealing run https://dcc.ligo.org/T1700293

Will be ready by June 28th afternoon

2018-04-04

• 16:10am in chamber
  • S1600551 in CR1
  • S1600552 in CR2
  • S1600554 in CR3
  • S1600555 in CR4
• 16:30 roughing pump on
• 16:40 turbo pump on

2018-04-09

• 3:30 pm in chamber
  • S1800634 in CR1
• 3:30 pm roughing pump on
• 3:45 pm turbo pump on

2018-05-01

• 16:10 pm in chamber
  • S1800516 in CR0
• 16:20 pm roughing pump on
• 16:40 pm turbo pump on

2018-05-02

• 10:05 am in chamber
  • S1800520 in CR0
• 10:06 am roughing pump on
• 10:20 am  turbo pump on

2018-05-02

• 17:37 added ND because QPD was oversaturated. Repeating the measurement without venting
  • S1800520 in CR0

  2018-05-04

• 02:21 pm in chamber:
  • AK_01 in CR1
  • AK_03 in CR3
• 02:25 pm roughing pump on
• 02:44 pm turbo pump on

• 03:30 pm in chamber:
  • S1800516 in CR0
• 03: 35 pm roughing pump on
• 03:42 turbo pump on

2018-05-09

• 01:57 pm in chamber:
  • S1800515 in CR0
• 01:58 pm roughing pump on
• 14:05  turbo pump on

2018-04-04

• 12:09 pm in chamber
  • S1600593 in CR1
  • S1600594 in CR2
  • S1600595 in CR3
  • S1600596 in CR4
• 12:00 pm roughing pump on
• 12:12 pm turbo pump on

   

• 12:30 pm in chamber
  • S1800519 in CR0
• 12:31 pm roughing pump on
• 12:50 pm turbo pump on

• 02:27 pm in chamber
  • S1600597 in CR1
  • S1600598 in CR2
  • S1600599 in CR3
  • S1600600 in CR4
• 02:27 pm roughing pump on
• 02:35 pm turbo pump on

• 02:40 pm in chamber
  • S1800516 in CR0
• 02:40 pm roughing pump on
• 02:54 pm turbo pump on

• 01:41 pm in chamber
  • S1800520 in CR0
• 01:41 pm roughing pump on
• 01:59 pm turbo pump on

• 03:10 pm in chamber
  • S1600587 in CR1
  • S1600588 in CR2
• 03:10 pm roughing pump on
• 03:24 pm turbo pump on

• 16:57 in chamber
  • S1600528 in CR1
  • S1600531 in CR2
  • S1600543 in CR3
  • S1600544 in CR4
• 16:57 roughing pump on
• 17:06 turbo pump on

• 11:00 in chamber
  • S1600609in CR1
  • S1600611 in CR2
  • S1600612 in CR3
  • S1600613 in CR4
• 11:15 roughing pump on
• 11:26 turbo pump on

• 09:04 in chamber
  • S1600587 in CR1
  • S1600588 in CR2
  • S1600614 in CR3
• 09.15 roughing pump on
• 09:20 turbo pump on

• 16:39 in chamber
  • S1600526 in CR1
  • S1600553 in CR2
  • S1600557 in CR3
  • S1600558 in CR4
• 16:39 roughing pump on
• 16:46 turbo pump on

• 17:40 pm in chamber
  • S1800617 in CR0
• 17:45 roughing pump on
• 17:57 turbo pump on

• 16:20 in chamber
  • S1800618 in CR0
• 16:20 roughing pump on
• 16:30 turbo pump on

• 14:45 in chamber
  • S1800619 in CR0
• 14:45 roughing pump on
• 14:55 turbo pump on

• 14:41 in chamber
  • S1800620 in CR0
• 14:45 roughing pump on
• 14:54 turbo pump on

• 14:18 in chamber
  • S1600541 in CR1
• 14:18 roughing pump on
• 14:23 turbo pump on

• 10:50 am in chamber
  • S1600594 in CR1
  • S1600595in CR2
  • S1600597 in CR3
  • S1600598 in CR4
• 10:50 pm roughing pump on
• 11:00 pm turbo pump on

One of the HeNe lasers died (the one for measuring slots CR2 and CR4). It had no outgoing light when I came in this morning. I connected the laser to another identical power supply. The laser started going on and of and the power supply was making some sparkling noise. I swapped the laser with the test chamber (CR0). No re alignment was required for measurement slots CR1 and CR3. A very slight alignment was done for measuring slots CR2 and CR4 after the laser from the test chamber was installed. So temporary we do not have a setup to measure 2" samples easily. Attaching pictures of the broken laser`s label

Repeating the previous measurement after correcting the alignement. Did not vent the chamber.

• 21:15 in chamber
  • S1600594 in CR1
  • S1600595in CR2
  • S1600597 in CR3
  • S1600598 in CR4

• 16:18 in chamber
  • S1600584 in CR1
  • S1600599 in CR2
  • S1600591 in CR3
• 16:28 roughing pump on
• 16:37 turbo pump on

• 18:27 in chamber
  • S1600597 in CR1
  • S1600598 in CR2
  • S1600599 in CR3
• 18:28 roughing pump on
• 18:32 turbo pump on

• 18:01 in chamber
  • S1600594 in CR1
  • S1600594 in CR2
• 18:09 roughing pump on
• 18:13 turbo pump on

• 11:01 in chamber
  • S1800614 in CR1
  • S1800618 in CR2
  • S1800619 in CR3
  • S1600600 in CR4
• 11:10 roughing pump on
• 11:20 turbo pump on

• 19:30 in chamber
  • S1800614 in CR1
  • S1800618 in CR2
  • S1600600 in CR4
• 19:40 roughing pump on
• 19:45 turbo pump on

Started a measurement for CR1 and CR2 only. CR4 is instaled, centered and ready to be measured later

Aligned CR14 chamber back to 3" disks.

• 12:20 pm in chamber
  • S1600561 in CR1
  • S1600562in CR2
  • S1600563 in CR3
  • S160056 in CR4
• 12:20 pm roughing pump on
• 12:26 pm turbo pump on

• 14:30 in chamber
  • S1600571 in CR1
  • S1600572 in CR2
• 14:40 roughing pump on
• 14:50 turbo pump on

Installed a new HeNe laser for the old chamber cr0. No major alignement was required. The laser mount restored the alinement. Will run a test measurement now.

• 15:20 in chamber
  • S1800620 in CR0
• 15:30 roughing pump on
• 15:45 turbo pump on

• 17:50 in chamber
  • S1600641 in CR1
  • S1600642 in CR2
  • S1600643 in CR3
  • S1600644 in CR4
• 18:04 roughing pump on
• 18:13 turbo pump on