摘要:
A cathode for a discharge lamp contains emitter material, wherein a carbide layer is formed on an outer surface of the cathode, the carbide layer is formed on an area extending from a tip portion of the cathode, and two or more grooves extending toward the tip portion of the cathode are formed on the area where the carbide layer is formed.
摘要:
A short arc type discharge lamp wherein a cathode and an anode are arranged opposite to each other in an interior of a light emitting tube and said cathode comprises a main part made from tungsten and a tip end part made from thoriated tungsten, wherein thorium oxide particles having been peripherally coated with thorium are contained in the tip end part of said cathode.
摘要:
A short arc type discharge lamp includes a cathode and an anode arranged inside an arc tube to face each other. The cathode comprises a main body portion made of tungsten and an emitter portion made of thoriated tungsten that is joined at the tip of the main body portion, where a metal oxide other than thorium (Th) is contained in the main body portion of the cathode, and a tungsten carbide layer is formed on the metal oxide.
摘要:
A discharge lamp with excellent arc stability and excellent durability in which the use level of thoriated tungsten is restrained has an anode and a cathode in the interior of a discharge vessel, wherein said cathode is made up from a thoriated tungsten part with a tungsten filling ratio of at least 90 vol.-% and a main body part connected to said thoriated tungsten part and consisting of pure tungsten, wherein a ratio ST/S of a side surface area ST of said thoriated tungsten part and a side surface area S of said cathode is in a range of from 0.005 to 0.15, with the proviso that, in case the cathode has a length in the direction of the cathode axis which exceeds twice the maximum diameter of the cathode, a side surface area S is used for calculating the ratio ST/S which corresponds to the side surface area where the distance along the cathode axis from a tip end adjacent to the anode is twice the maximum diameter of the cathode.
摘要翻译:具有优异的电弧稳定性和优异耐久性的放电灯,其中钍钨的使用水平被限制在放电容器的内部具有阳极和阴极,其中所述阴极由具有钨填充比的钍钨部分 至少90体积%,以及连接到所述钍钨部分并由纯钨组成的主体部分,其中所述钍钨部分的侧表面积ST和所述钍钨部分的侧表面积S的比率ST / S 阴极在0.005至0.15的范围内,条件是在阴极的长度方向上阴极轴线的长度超过阴极最大直径的两倍的情况下,侧面积S用于计算 与沿着阴极轴线距离与阳极相邻的尖端的距离为两倍于阴极最大直径的侧表面积的比率ST / S。
摘要:
A short arc type discharge lamp wherein a cathode and an anode are arranged opposite to each other in an interior of a light emitting tube and said cathode consists of a main body part with tungsten as the main constituent and an emitter part comprised of thoriated tungsten, wherein an oxygen content of the main body part of said cathode is lower than that of the emitter part, and band-shaped tungsten carbide is formed at the tip end face of the emitter part of said cathode.
摘要:
A short arc type discharge lamp includes a cathode and an anode arranged inside an arc tube to face each other. The cathode comprises a main body portion made of tungsten and an emitter portion made of thoriated tungsten that is joined at the tip of the main body portion, where a metal oxide other than thorium (Th) is contained in the main body portion of the cathode, and a tungsten carbide layer is formed on the metal oxide.
摘要:
A discharge lamp with a high output power in which an increase of the current to be supplied to the discharge lamp can be enabled without the need to enlarge the discharge lamp and the surrounding system. The discharge lamp includes an arc tube having a pair of opposed electrodes, at least one of the electrodes having an electrode body in which a hermetically sealed interior space is formed, and a heat conductor partially filling the hermetically sealed interior space. This heat conductor consists of metal that has a higher thermal conductivity or a lower melting point than the metal comprising the electrode body.
摘要:
To prevent corrosion of the sites where upholding parts of electrodes are attached and to easily effect exact positioning of the electrodes, in a discharge lamp in which the sealing tubes of a discharge vessel are sealed with sealing bodies of material with a gradient function which is formed from a dielectric powder of the same material as material of the discharge vessel and from a conductive powder, the upholding parts of the electrodes extend through axial openings which are formed in the sealing bodies and are attached and hermetically sealed on the outer faces of the sealing bodies by means of a solder or the like.
摘要:
An EUV radiation source comprises a first electrode having a first through hole, a second electrode having a second through hole, a movable insulator, having a plurality of third through holes, provided between the first and second electrodes, wherein actuating gas is introduced in the first, second through holes and one of the plurality of third through holes, and voltage is impressed between the first and second electrodes when the first, second and plural through holes are located on a common axis.
摘要:
The present high-load and high-intensity discharge lamp includes a cathode made of a material which does not (substantially) include thorium but can be used as a cathode material of high heat load, so that a long lifetime and high stability corresponding to those of thoriated-tungsten can be realized. Specifically, the cathode is made of a metal base having a high melting point which mainly consists of tungsten and includes a coexisting substance in which an oxide of at least one kind of metal selected from lanthanum, cerium, yttrium, scandium, and gadolinium and an oxide of at least one kind of metal selected from titanium, zirconium, hafnium, niobium, and tantalum are coexistent. The conversion grain size of the coexisting substance is 15 μm or greater, and the plurality of coexisting substances are present in the metal base with a high melting point.