Photomultiplier tube housing & refrigerated chamber

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OBJECT TYPE
dual
DATE
1979
ARTIFACT NUMBER
2008.0197.004
MANUFACTURER
Products for Research Inc.
MODEL
TE-211RF-01
LOCATION
Danvers, Massachusetts, United States of America

More Information


General Information

Serial #
6901-79
Part Number
4
Total Parts
4
AKA
N/A
Patents
N/A
General Description
Metal casing and parts/ Synthetic wire covering and parts/ Glass and synthetic dial casing

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length
32.5 cm
Width
31.5 cm
Height
30.5 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Astronomy
Category
Miscellaneous
Sub-Category
N/A

Manufacturer

AKA
Products
Country
United States of America
State/Province
Massachusetts
City
Danvers

Context

Country
Canada
State/Province
Ontario
Period
Unknown
Canada
A piece of equipment used at the David Dunlap Observatory at the University of Toronto, one of Canada's most important astronomical observatories. The David Dunlap Observatory opened in 1935 as the result of a bequest from the wife of David Dunlap. The telescope was a 74 inch (188 cm) reflector built by Grubb Parsons of Newcastle-upon-Tyne in England. The 74 inch was then the largest telescope in Canada (surpassing the 72 inch telescope of the Dominion Astrophysical Observatory in Victoria) and became the second largest in the world after the 100 inch Hooker Telescope of the Mt. Wilson Observatory outside Los Angeles. DDO's reputation grew and following WWII, it began to graduate most of the astronomers produced in Canada with University of Western Ontario far behind. Beginning in the 1960s a number of other astronomy departments were created but UofT/DDO held its place, a position it probably still holds. The DDO had a good technical staff which gave them an advantage and, with most of the 1940s to early 1970s top astronomers coming from UofT, grants from NRC and then ENSERC were almost guaranteed and allowed UofT's top astronomers -- Hogg, van den Berg, Fernie, Bolton, Kamper, Martin, etc. to acquire or build some of the best equipment available in university observatories. For optical observatories, only the DAO had technical staff and budgets that surpassed those of DDO. In 2007, citing increasing light pollution, the University of Toronto announced plans to sell the Observatory property. In June 2008, it was sold to Corsica Development Inc., a subsidiary of Metrus Development Inc. and the Observatory was closed. In 2009 the Observatory buildings and 80% of the site were designated a cultural heritage landscape. Also in 2009 Corsica and the Royal Astronomical Society of Canada, Toronto Centre announced an agreement allowing the RASC to provide public education and outreach programs at the observatory, and to operate the 188 cm telescope.
Function
A cooling device used to control the temperature of the photomultiplier tube of an astronomical photometer.
Technical
A piece of equipment used by Dr. Don Fernie with his dual photometer. It contains a refrigerated chamber used to maintain the photomultiplier tubes of a photometer at a low temperature-- typically -40 C. The reason is that photomultiplier tubes are more efficient the colder they are and more stable. The tubes most frequently used were RCA tubes.
Area Notes
Unknown

Details

Markings
Label on one side reads 'Refrigerated Chamber/ MODEL TE-211RF-01/ Ser. No. 6901-79/ PRODUCTS FOR RESEARCH, INC./ 78 Holten St., Danvers, Mass./ Made in U.S.A.'/ Labels on each side read '[logo] Photomultiplier Tube Housing/ PRODUCTS FOR RESEARCH, INC./ Made In U.S.A.'
Missing
Unknown
Finish
Textured black painted finish on two sides of casing and cover; brushed metal on two sides, top and underside/ Metallic grey parts/ Red and black synthetic parts/ Metallic temperature dial with black indicator needle, in black synthetic and colourless transparent glass casing/ Plated parts
Decoration
N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Products for Research Inc., Photomultiplier tube housing & refrigerated chamber, circa 1979, Artifact no. 2008.0197, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2008.0197.004/

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