US 12,253,470 B2
Plasma source chamber for a spectrometer
Norbert Quaas, Bremen (DE); Ayrat Murtazin, Bremen (DE); Sebastian Geisler, Bremen (DE); Tobias Wolf, Bremen (DE); Jan Rathkamp, Bremen (DE); Dirk Wohlers, Bremen (DE); and Mikhail Skoblin, Dolgoprudny (RU)
Assigned to Thermo Fisher Scientific (Bremen) GmbH, Bremen (DE)
Appl. No. 17/598,839
Filed by Thermo Fisher Scientific (Bremen) GmbH, Bremen (DE)
PCT Filed Apr. 8, 2020, PCT No. PCT/EP2020/060048
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/208085, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 1905069 (GB), filed on Apr. 10, 2019.
Prior Publication US 2022/0187212 A1, Jun. 16, 2022
Int. Cl. G01N 21/73 (2006.01); H05H 1/30 (2006.01)
CPC G01N 21/73 (2013.01) [H05H 1/30 (2013.01); G01N 2201/022 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A plasma torch chamber for use in a spectrometer, the plasma torch chamber comprising:
an inner housing comprising a plurality of walls for accommodating a plasma torch within the inner housing;
an outer housing comprising a plurality of walls and accommodating the inner housing; and
a shielding element arranged for covering two substantially perpendicular walls of the outer housing, said shielding element and said two walls of the outer housing defining a further spacing that extends between said shielding element and said walls of the outer housing so as to allow a first flow of air between said shielding element and the outer housing, one of said walls of the outer housing preferably being, in use, a top wall,
wherein the outer housing comprises at least one outer air inlet opening in a first wall of the outer housing and at least one outer air outlet opening in a second wall of the outer housing,
wherein the walls of the inner housing and the walls of the outer housing define a spacing so as to allow a second air flow from the at least one outer air inlet opening to the at least one outer air outlet opening through the spacing between the inner housing and the outer housing,
wherein the inner housing comprises at least one inner air inlet opening in a first wall of the inner housing and at least one inner air outlet opening in a second wall of the inner housing to allow a third air flow from the at least one inner air inlet opening to the at least one inner air outlet opening through the inner housing, and
wherein each of the inner housing and the outer housing has an opening therein to accommodate an axial viewing element that is located above the plasma torch.