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The dilution unit of an Oxford Instruments Top Loading Dilution Refrigerator.
This system is pretty cool. It's designed such that the `mixture' stays circulating in the fridge all the time and only the probe has to be removed when changing devices. This gets the turn around time down to just a few hours (if you work hard) compared to a couple of days for all the other systems we have.
The probe is a thin insulating rod about 3m long that passes all the way from room temperature down into the mixture (rated at ~20mK) in the glass mixing chamber. To counter the large heat leak it is anchored by a thread at the 1K pot (which is why the pot is so massive and has it's own level meter!) and by a cone at the top of the mixing chamber.
The system was commissioned in 1985 and I think it was one of the first prototypes of this sort of system. It has a few problems (like drinking helium like there's no tomorrow) but it's given plenty of good results in it's time.
It's currently open because the sintered silver heat exchanger has a leak (very bad news).
Wikipedia has a very basic page on the history of dilution fridges.
Dr. Steven Daniels in a Physics lab in the Physical Sciences building on the campus of Eastern Illinois University in Charleston, Illinois on June 18, 2019. (Jay Grabiec)
Dr. Jie Zou teaching in a Physics lecture in the Physical Sciences building on the campus of Eastern Illinois University in Charleston, Illinois on June 5, 2019. (Jay Grabiec)
A nebula (from Latin: "cloud" ; pl. nebulae or nebulæ, with ligature or nebulas) is an interstellar cloud of dust, hydrogen gas, helium gas and plasma.
"The Flame Nebula, designated as NGC 2024, is in the Constellation Orion. It is about 900 to 1,500 light-years away.
The bright star Alnitak (ζ Ori), the easternmost star in the Belt of Orion, shines energetic ultraviolet light into the Flame and this knocks electrons away from the great clouds of hydrogen gas that reside there. Much of the glow results when the electrons and ionized hydrogen recombine. Additional dark gas and dust lies in front of the bright part of the nebula and this is what causes the dark network that appears in the center of the glowing gas."
Photos of various physics labs going on in the physical sciences building on the campus of Eastern Illinois University in Charleston, Illinois on September 16, 2010. (Jay Grabiec)
This is like the sex people have in PG-13 rated stuff, where they may be naked but you know that there is no way they could actually be having sex from the distances.
Passionate lesson delivery and clear explanation of concepts with step-by-step guide to solving problems
Dr. Steven Daniels in a Physics lab in the Physical Sciences building on the campus of Eastern Illinois University in Charleston, Illinois on June 18, 2019. (Jay Grabiec)
This is a good community outreach from the University of Maryland
(cc) Shashi Bellamkonda www.shashi.name Please feel free to use this picture in your blog ,website or presentation and credit as shown. Thanks.
Dr. Steven Daniels in a Physics lab in the Physical Sciences building on the campus of Eastern Illinois University in Charleston, Illinois on June 18, 2019. (Jay Grabiec)
d'ya like the Physics hoody dudes?
i have a Biology & Chemistry set (ho,ho!) too :)
SCIENCE RULES!
Yeah!
Dr. Steven Daniels in a Physics lab in the Physical Sciences building on the campus of Eastern Illinois University in Charleston, Illinois on June 18, 2019. (Jay Grabiec)
Title: Physics Building - 9
Digital Publisher: Digital: Cushing Memorial Library and Archives, Texas A&M University, College Station, Texas
Physical Publisher: Physical: Graphic Services, Texas A&M University
Date Issued: 2011-08-17
Date Created: 1964
Dimensions: 4 x 5 inches
Format Medium: Photographic negative
Type: image
Identifier: Photograph Location: Graphic Services Photos, Box 22, File 22-635
Rights: It is the users responsibility to secure permission from the copyright holders for publication of any materials. Permission must be obtained in writing prior to publication. Please contact the Cushing Memorial Library for further information