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for taking the time to be with us today

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thank you

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now we're out of building 4718 and the

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x-ray calibration facility where we're

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joined by jeff kegley who's going to

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tell us a little bit about his mission

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here at nasa

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as part of the optics office and the

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science and mission systems directorate

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here at the center we're chartered to

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test and evaluate the optics and

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subsystems

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related to large space telescope

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observatories well tell us about some of

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the projects that you've seen come

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through here the facility was

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specifically built to do the ground

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testing calibration of the chandra x-ray

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observatory since that time we've done

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other x-ray telescopes including the

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solar b

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and several solar x-ray imagers so jeff

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what makes this facility so unique

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facilities actually unique in two

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capabilities

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it's the world's largest x-ray telescope

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calibration facility

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and we have the unique capability of

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being able to test optics down to minus

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440 degrees fahrenheit so to simulate

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the the environment of space exactly

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well i think part of the uniqueness of

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the facility itself is also in its

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design and part of the reason is where

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lori is right now well jeff we come

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outside now to probably the most

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eye-catching feature of this facility

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tell me what we're looking at here

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yeah lori this is we could ask about

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this a lot this is our x-ray guide tube

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in order to do a ground test or

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calibration of an x-ray telescope or the

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optics or detectors associated with that

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telescope you have to have the x-ray

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source a long distance away so that the

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x-rays are nearly parallel when they get

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to the test article down here on this

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end so how far away are we talking about

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here

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this this facility is actually over 1700

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feet long

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wow and that actually leads into

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whatever you're testing then right

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exactly the x-ray telescope for its

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optics and detectors actually are in a

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vacuum chamber and clean room in the

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building all right i think that's where

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bill is i think he's actually put on a

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suit and ready to go

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yes lori i lost the coin toss and so i'm

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dressed head to toe in a clean suit and

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we're joined by jeff again and jeff

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explain to everyone why we're dressed

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like this

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testing x-ray

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optics or direct incident optics for

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telescopes or their detectors

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it's ins they're extremely sensitive to

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contamination and so you have to work in

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a class 1000 clean room like this and

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have an extremely clean vacuum chamber

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so explain to everyone well what these

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gentlemen are doing right now

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we assemble hardware out here for test

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work and then in the clean environment

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and then we're able to simply roll it

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into the vacuum chamber on these rail

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systems and that's what these guys are

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doing then we close the large

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door on the chamber and then we're able

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to simulate the environment we need to

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for the test and dropping the

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temperature in that chamber is one of

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the unique capabilities here right

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exactly we have the capability in this

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chamber now to drop to to minus 440

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degrees fahrenheit

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and and the end of the chamber is where

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the evacuated x-ray guide tube yes long

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through that lorry was that outside

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exactly now tell us a little bit about

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the big project you've got coming up

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we're really excited about it we we're

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going to test the flight mirrors for the

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james webb space telescope project over

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the next four years

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we're currently this summer we're

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getting ready and that's we're working

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right now getting ready to test

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the backplane structure to demonstrate a

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technology readiness level for that

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program also

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jeff we look forward to hearing about

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those results thanks very much for

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letting us come visit you today

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and thank you for joining us on the

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program for laurie makes who's sitting

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comfortably in the conference room i'm