ISS Grid Spacers Inventory List

Alexander Vostrikov

University of Chicago

vostrikov@uchicago.edu

August 12, 2013

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 1 / 16

Grid Spacers Inventory List

Box Top GS Middle GS Bottom GS

#1Electroded GSs

2 mm43 MΩ

IR imaging

4.45 mm259 MΩscraped

4.45 mm115 MΩ

chem-2 400C

4/21/13Chem-1 Set-2

2 mm18.1 MΩ

2 mm16.1 MΩ

4.45 mm37.8 MΩ

4/23/13Chem-1 Set-3

2 mm8.33 MΩ

2 mm8.17 MΩ

4.45 mmshorten 37.4 kΩ

4/25/13Chem-1 Set-4

2 mm3 MΩ

2 mmshorten 30 kΩ

4.45 mmshorten

4/30/13Chem-1 400C

Set-5

2 mmshorten ∼kΩ

broken

2 mmshorten ∼kΩ

4.45 mmdestroyed

4/30/13Chem-1 400C

Set-6

2 mmshorten ∼kΩ

2 mmshorten ∼kΩ

4.45 mmshorten ∼kΩ

Chem-12 mm

2.87 MΩ2 mm

8.00 MΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 2 / 16

Box #1 Electroded GSs

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Box #1 Electroded GSs: Top

Thin GS; P from 2.35 · 10−4 to 2.72 · 10−4 Torr

0 200 400 600 800 1000 1200Voltage, V

0

5

10

15

20

25

30C

urr

en

t,µ

A

R = 42.89 MΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 4 / 16

Box #1 Electroded GSs: Middle

Thick GS; P from 4.35 · 10−4 to 5.03 · 10−4 Torr

0 200 400 600 800 1000 1200Voltage, V

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5C

urr

en

t,µ

A

R = 259.31 MΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 5 / 16

Box #1 Electroded GSs: Bottom

Thick GS; P from 2.92 · 10−4 to 4.60 · 10−4 Torr

0 200 400 600 800 1000 1200Voltage, V

0

2

4

6

8

10C

urr

en

t,µ

A

R = 115.66 MΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 6 / 16

Box 4/21/13 Chem-1 GSs Set-2: Top

Thin GS; P is 5.07 · 10−5 Torr

0 200 400 600 800 1000 1200Voltage, V

0

10

20

30

40

50

60

70C

urr

en

t,µ

A

R = 18.09 MΩ

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Box 4/21/13 Chem-1 GSs Set-2: Middle

Thin GS; P from 1.30 · 10−4 to 1.37 · 10−4 Torr

0 200 400 600 800 1000 1200Voltage, V

0

10

20

30

40

50

60

70C

urr

en

t,µ

A

R = 16.14 MΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 8 / 16

Box 4/21/13 Chem-1 GSs Set-2: Bottom

Thick GS; P is 1.63 · 10−4 Torr

0 200 400 600 800 1000 1200Voltage, V

0

5

10

15

20

25

30C

urr

en

t,µ

A

R = 37.83 MΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 9 / 16

Box 4/23/13 Chem-1 GSs Set-3: Top

Thin GS

0 200 400 600 800 1000 1200Voltage, V

0

20

40

60

80

100

120

140C

urr

en

t,µ

A

R = 8.33 MΩ

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Box 4/23/13 Chem-1 GSs Set-3: Middle

Thin GS; P from 1.51 · 10−4 to 1.65 · 10−4 Torr

0 200 400 600 800 1000 1200Voltage, V

0

20

40

60

80

100

120

140C

urr

en

t,µ

A

R = 8.17 MΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 11 / 16

Box 4/23/13 Chem-1 GSs Set-3: Bottom

Thick GS shorten

0 50 100 150 200 250 300Voltage, V

0

1

2

3

4

5

6

7

8C

urr

en

t,m

A

R = 37.37 kΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 12 / 16

Box Chem-1 top 4. MOhm B 6.7 M: Top

Thin GS; P from 1.43 · 10−4 to 1.48 · 10−4 Torr

0 200 400 600 800 1000 1200Voltage, V

0

50

100

150

200

250

300

350

400C

urr

en

t,µ

A

R = 2.87 MΩ

A. Vostrikov (UChicago) ISS GS Inventory List August 12, 2013 13 / 16

Box Chem-1 top 4. MOhm B 6.7 M: Middle

Thin GS; P from 1.59 · 10−4 to 1.68 · 10−4 Torr

0 200 400 600 800 1000 1200Voltage, V

0

20

40

60

80

100

120

140C

urr

en

t,µ

A

R = 8.00 MΩ

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Box 4/30/13 Set-6

Top, middle and bottom GSs are shorten, scraping does not help.

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Box 4/30/13 Set-5

Top GS is broken. Middle GS is shorten, scraping does not help. BottomGSs is destroyed.

Broken top GS

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