Introduction to Pumps

Nanotechnology: A Maker's Course
Introduction to Mechanical Pumps, Turbo Pumps, and Cryopumps
Link to the full Coursera course: www.coursera.org/learn/nanote...
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The Shared Materials Instrumentation Facility (SMIF) is the Pratt School of Engineering’s core facility that enables materials, devices, and integrated systems research at Duke University in a variety of fields that include nanotechnology, biomaterials and biomedical engineering, information sciences, optoelectronics, sensor technology, and renewable energy. SMIF is housed in the Fitzpatrick Center for Interdisciplinary Engineering, Medicine and Applied Sciences (FCIEMAS). The facility consists of 7,000 square feet of clean room fabrication space, and nearly 3,000 square feet of specialized laboratory space for characterization and imaging equipment. SMIF is part of the Research Triangle Nanotechnology Network (RTNN) in partnership with similar facilities at North Carolina State University and the University of North Carolina at Chapel Hill. The RTNN is one of 16 organizations nationwide that comprise the National Science Foundation sponsored National Nanotechnology Coordinated Infrastructure (NNCI) program.
SMIF is open to all trained students, staff, faculty, and researchers and is used for both research and educational purposes. SMIF has nearly 700 users, of which 2/3 come from Duke University and 1/3 come from external academic institutions or industry. SMIF staff trains students and researchers to use the lab equipment and instruments themselves, and provides guidance and support in developing processes and methodologies that utilize these capabilities. Alternatively, SMIF staff can run samples for researchers as a service. SMIF also coordinates various educational and outreach activities.

[@ThingEngineer]

I can not thank you enough for this concise explanation and demonstration of vacuum pump options and their roles. This is easily the best I've seen here and am surprised it’s not more watched. I appreciate your enthusiastic methods Nan and Callie's adorable demonstrations. It seems you have some great resources that will be helpful on my current project, CVD & Czochralski crystal growth.

[@dukeuniversity-smif2466]

Thanks for watching! We're happy you enjoyed the video.

[@sanjeewadissanayake6037]

Nice and smooth explanation with no stress on voice. Sounds like listening to a kids-story!

[@ankitudai5089]

Extremely well explained. The whole series is amazing. Thanks a lot!

[@venom_m6686]

just wowww ..... thank you for this explanation and animations

[@sirishajeripothula7891]

Very informative !!

[@dukeuniversity-smif2466]

Glad you think so!

[@liemh9290]

Wow!!! Great video! I work at AMAT and install these on the daily! Great to know the difference between the two and how they works :)

[@Ali-hy2gf]

This video is extremely good! I'm surprised it's not as popular.

[@mehdiebaditurk1]

Extremly well and elaburately explained. Thanks

[@echo5257]

very good and easy to understand thanks

[@tadg.793]

wow! great teaching!!! I understand better now!!

[@HITESJ6A]

Great tutorial. Thanks Jan

[@mariamhasany5740]

amazing content

[@gauravbassi5871]

best video , yes we enjoy this lesson

[@PKMreso]

Really educational.

[@manuelenriqueguevaravera7397]

Very interesting the explication

[@larrykent196]

Thank you.

[@quasa0]

amazing

[@jevs8188]

great video! i don´t really know why i watched the full thing since this isn´t particularly useful to me. But still, great video :D

[@vizionthing]

I assume the roughing pump is not run 'through' the turbo pump, if this is the case is the path to the roughing pump switched via valves from chamber to turbo pump output?

[@hankdesmidt5458]

That is correct

[@ywk7282]

where is the outlet of the mechanical pump linked to? Is it linked to low pressure air in the machine?

[@dukeuniversity-smif2466]

The outlet of the mechanical pump simply goes into the room (or into exhaust ducts in cases where potentially dangerous gases are used).

[@ywk7282]

What is a cross over rating? I didnt quite get that part...

[@dukeuniversity-smif2466]

A cryo pump has an upper limit regarding the total amount of gas it can pump; this limit is termed the ‘cross-over rating’ or CR. If you exceed this limit, the pump will not be able to function properly, will over-heat, and shut down. The “Ideal Gas Law” tells us that the amount of gas present in any closed system is proportional to the product of the pressure and volume, or P x V (P=pressure, V=volume). So, if a cryo pump has a given CR, and we need to know the maximum pressure at which we can operate that pump, we simply divide CR by V. This gives us a pressure to which we must pump down the chamber (with a mechanical pump) before using the cryo-pump.

[@JoseMatosA]

Thank you.

[@dukeuniversity-smif2466]

You're welcome!