Guard, safety

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OBJECT TYPE
microwave generator
DATE
1975
ARTIFACT NUMBER
2008.1884.005
MANUFACTURER
Unknown
MODEL
Unknown
LOCATION
Unknown

More Information


General Information

Serial #
N/A
Part Number
5
Total Parts
6
AKA
N/A
Patents
N/A
General Description
An artifact comprised of metal elements/Un objet fait avec du matériel en métal.

Dimensions

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

Length
12.1 cm
Width
20.3 cm
Height
12.9 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Chemistry
Category
Test-measurement equipment
Sub-Category
N/A

Manufacturer

AKA
Unknown
Country
Unknown
State/Province
Unknown
City
Unknown

Context

Country
Canada
State/Province
Ontario
Period
1967-1990s
Canada
The vacuum Ebert spectrograph, developed by Donald A. Ramsey at the NRC, was a central instrument in Canada’s contributions to spectroscopy from approximately 1950 to the 1990s. Lead by Nobel Laureate, Gerhard Herzberg, Canada was a leader in this part of physics in the post WWII era. Using this device, D.A. Ramsey and Barry Lutz were able to confirm that the Kuiper bands of Uranus were made of methane. This finding had eluded scientists since the early days of astrophysics. Ramsey, a gifted experimenter, was able to produce this extremely high-resolution spectrograph, in order to determine the origins of the bands in the laboratory. The laboratory findings were compared with Lutz’s observations and measurements of the Uranus bands. The measurements were based on observations taken at the Mount Hamilton Station of the Lick Observatory, California. Le spectrographe Ebert avec une pression à vide était conçu au NRC par Donald A. Ramsey. L'instrument était primordial pour que le Canada puisse contribuer au domaine de spectroscopie pour plus de quarante ans entre 1950 et les années 1990s. La recherche était menée par Gerhard Herzberg qui était un lauréat pour le prix Nobel. Canada est rapidement devenu le meneur dans ce domaine de la physique après la deuxième Guerre Mondial avec Herzberg en charge. M. Ramsey et Barry Lutz ont réussit à confirmer que les bandes Kuipers de l'Uranus sont faits en méthane en utilisant cette machine. La découverte échappait aux scientifiques depuis l'enfance de l'astrophysique. Ramsey était capable de produire ce spectrographe à haute résolution pour déterminer l'origine des bandes au laboratoire. Le scientifique a pu comparer ces résultats avec ceux de Lutz. Les deux séries de mesurément étaient pris à la station de Mont Hamilton a l'observatoire Lick en Californie.
Function
This artefact is possibly designed to allow the user to operate the generator in conjunction with a Ramsay spectrograph at a safe distance based on the manufacturer’s suggestion. Cet artefact est possiblement conçu pour permettre à l'utilisateur d'opérer une génératrice avec un spectrographe Ramsey a une distance sécurisée.
Technical
This type of spectrograph dates back to the work of Hermann Ebert in 1889. He developed a spectrometer that consisted of an entrance slit, a single concave spherical mirror, a diffraction grating, and a small photographic plate in the plane of the entrance slit. This artifact is a Ramsey spectrograph, a 33-meter multiple-path cell, that produced spectra of the highest resolution at the time. The main body of this spectrograph was made by Fleck Industries before being installed at the NRC. Despite difficult struggles with leaks in the early construction phase of the optical components, large leak detectors (as big as fridges at the time) were installed and used to locate and fix the leaks. The resultant vacuum conditions allowed for much longer exposures and more precise images. This instrument was also a success due to its optics. The initial resolution of the instrument was not as good as expected, and a new mirror had to be ground and installed. The resolution improved significantly. There were also two gratings in this model, one high and the other low resolution. Ce genre de spectrographe est inspiré par le travail de Hermann Ebert en 1889. Il a développé un spectromètre qui possédait une fente d'entrée, un miroir concave et sphérique, un réseau de diffraction et une plaque photographique située sur le plan de la fente d'entrée. Cet artefact est un spectrographe Ramsey qui possède un trajet-multiple de plus de trente-trois mètres qui produisaient une résolution de la plus haute qualité de sa génération. Le corps du spectrographe était fabriqué par Fleck Industries. Malgré les fuites au début de la phase de construction des composantes optiques, l'installation des détecteurs de fuites installer par la suite ont réussi à trouver et arrêter le déluge. Les conditions après l'installation a construit des conditions de pression à vide qui permettait à la machine de développer des images plus précises avec une exposition prolongée. L'instrument était aussi favori grâce à ces composantes optiques. La résolution initiale n'était pas une haute gamme et donc un nouveau miroir a dû être dépoli et installer. Ceci a augmenté la résolution a un niveau requis. Il y avait aussi deux genres de réseau qui accompagnaient ce modèle qui permettait à une résolution base ou celui qui apportait une résolution plus augmentée.
Area Notes
Unknown

Details

Markings
On the front of the artifact/Sur le devant de l’artefact: “CORNER/DIRECTOR,DISTANCE,OUTPUT-/WATTS/[1”-6”],[20-40/60-80/80-90/80-100/90-115/100-125]/SUGGESTED DISTANCE-/TO-POWER RATIOS FOR/NORMAL INDIVIDUALS”.
Missing
Artifact appears complete/L'objet a toutes les pièces.
Finish
An artifact made of a silver coloured metal material. Its body is flat and folded. It has a sticker on its front face that has both white and black lettering. A cylindrical handle made of the same material as the body of the artifact extends vertically from the top of the object. A tube made of yet again the same substance pierces the body of the handle and runs parallel to the body of the object. One metal rod extends vertically through the handle from inside the object while another travels horizontally inside the body of the artifact. It is possible that artifact 2008.1884.004 was the cover for this object. Un artefact fait avec du matériel en métal de couleur argent. Il a un corps aplati qui est plié en forme de triangle. Un autocollant sur le devant de l'objet possède du lettrage blanc et noir. Une manche fait avec le même matériel que son corps sort de la tête de l'artefact. La manche a un tuyau qui passe au travers son corps perpendiculairement et voyage parallèle au corps de l'objet. À l'intérieur de l'artefact il y a deux tiges. Une tige monte à l'intérieur de la manche pendant que l'autre tige imite le tuyau et voyage à l'horizontale. Il est possible qu'artefact 2008.1884.005 était le couvercle pour cet objet.
Decoration
N/A

CITE THIS OBJECT

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

Unknown Manufacturer, Guard, safety, circa 1975, Artifact no. 2008.1884, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/item/2008.1884.005/

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