DE1937924A1 - Mass spectrometer tube - Google Patents

Description

Societe Generale de Constructions Electriques et Mecaniques (AISEEOM), Paris I6e * me _f Avenue KlSber 38 (France)

"Mass Spectrometer Tube" "■

French priority of 25 ο July 1968 from the French patent application No. 160 674 (Seine)

The invention relates to a mass spectrometer tube _o

The known spectrometer tubes usually exist from a tight, curved envelope of right-angled cross-section, inside of which, with the help of an external magnet, a deflecting magnetic field is generated that is at right angles to the Radius of curvature.

The ionized particles _? which are injected with a constant G eschwindigkeit in this envelope, · circular paths whose radius proportional have ₀ This Analysierröhren to the mass of Ceilckenist describe even serious disadvantages ,, ■ /. £>

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The air gap of the magnet, which should be relatively large, in order to enable the Hindur c litre th of a bundle of ionized particles sufficient for the evaluation, it does not permit to generate a very strong magnetic field with normal magnets, what-for particles of great mass too large radii of curvature and there-

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9098 8 5/1253

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mil; too long Teilohenbahnen leads. This fact favors the possibility of collisions between the ions and the neutral particles that are present in the tubular envelope and reduce the efficiency of the spectrometer tube » '

This deficiency is still 'enhanced by the relatively poor vacuum that can be achieved in the spectrometer tube den'üblicheri pumping means / whereby a significant number of neutral molecules in the tube remains _β The invention has the object of avoiding this the known mass spectrometer tubes Adhering compartment parts to significantly increase the efficiency of such tubes by increasing the strength of the magnetic field and improving the vacuum4

This object is achieved in the device of the type specified in the introduction in that, according to the invention, a superconducting Winding to generate the deflecting magnetic field - pre- [ see is "

Such windings allow with reduced space requirements and lower weight the. Generating a very strong Magnetic field in a large volume 'Because of' this property describes a particle, larger mass an arc of a circle with a small radius of curvature, whereby the total length of the circular arc and consequently the possibility of collisions with other- \ smaller particles

According to a particularly advantageous embodiment, the superconducting .Y / winding attached to the analyzer tube / and the winding-tube arrangement · immersed in a cooling liquid. ..;

- This results in a further advantage, that at the same time with the decrease in the length of the track, the number of in the

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Analyzer rölire existing Llolekülc is reduced and that The risk of collisions is further reduced.

. The very "low temperatures (below -195 0), to which the analyzer tube is exposed, namely calls a Condensation of most of the neutral lollipops and reduced) their number by a factor of 1,000 to 10,000, which is equivalent to i tend with an extremely good vacuum.

In the drawing is a Liassens ectrometer tube according to the invention together with a cooling device in an embodiment shown in Epi oehenatically illustrated, ·

As can be seen from the drawing, the device consists of an ion source 1 and an analysis tube 2, which is provided with an ion collector 3, which is connected to devices (not shown) for amplifying and generating the direct current Ion source 1 is connected to a device for pumping out and for supplying in the suaiialyolerenden {Jases and attached to the analyzer tube 2 via an intervening slide assembly 5 ; .Ganes into the: spectrometer tube ""'to limit.. - "" - "■■ - ■""■ -. ■ ·" i

On the curved part "of the -Ι: Πιτε 2 there is a stipral-extende \ 7ioklung 6, the / aur i3rzeugan_: the deflection magnetic field · serves" The superconducting ulcer and the curved part j of the analyzer rchx-e 2 tai ^ chen in a cooling device 7. » . the] with flüssigCEi Kelitin (init 4 ° Ii) is filled Lic Y / j andung the tube 2 is to be in the upper part thereof · düJcn to keep U Hi the heat exchange with the environment low. ":

The from the ionic source 1 .uiid of the analvcator tube 2

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standing device is-a flange : 3 represents ii ^ ul device 7

909885/1253

fastened through this splash: S leads an electrical connection 9 * 'which the lanenltollektor 3 with not shown
Let establishments "connect, which are located on ümgehun gate rap era- * door. This connection must be sensitive to both the helium and the temperature of the ICUhI device
be; cie ist_ läeicpielsv / oise ± n a Crlaörohr 'aiigeerdneto

The KUhleinrieiltuiig, 7 "owns" yier tlrfthüllüngeni the. three successive intercourse circling the Z? /iöctienrar.ua '10, which iut and a connection for pumping out fee- ^v sit at j the interim space 12, which is supplied via external connection 13 _: liquid nitrogen and the space 14 * -' 4 ^ r ^ evafcuiert .13t, and einoii Ana cliluß 15 'zum: Abpumj-en .besitzt · ,. : - '■ .; : ■■ ". -." ■■■■ "';.

909885 / 12S3 / BADORIÖINÄL

Claims (2)

Dtpf.-lnf. DIpI. otfc DIETRICH TEWINSKY PATENT ADVOCATE SIlM ₁₁ L, - <M iittLmm ^^ M ■ mm / I - * OKmBOT. Vl T * foit M17tt ^ ^ 5664-IV / iIi ■ ■ - SociStl! "Ifceralc de O ona true ti ons Blootrlriues et M (AISTHOLl) ₁ Paris 16, Avdnue ICllber 38 (France) • Pat on claim :, ■ Irlasson spectroineter stirrer, characterized by an extraconducting connection to generate the deflecting magnetic field 2. Lassenenspelctroineterröhre according to claim 1, characterized in that the superconducting winding on the Anälysatorrühro is old and immersed with it in a cooling liquid. Blank page