-
公开(公告)号：US07086577B2
公开(公告)日：2006-08-08
申请号：US10358265
申请日：2003-02-05
IPC分类号： B23K28/00
CPC分类号： A61N5/1001 , H01J35/32 , H01J2235/164
摘要： An emitter for a miniature X-ray apparatus comprises an insulating shell, an anode, and a cathode. The insulating shell includes a conical brazing surface, brazed to a conical brazing surface on the anode. The braze consists of a pure titanium layer and a pure tin layer. During brazing, the pure metals react and bond to the insulating shell and create a titanium-tin alloy between the pure layers. Pure tin is sputtered from tin sputter target onto the exposed brazing surfaces of the cathode cap and the anode. The insulating shell is placed in a vacuum chamber of deposition applicator, which deposits an active metal onto the shell brazing surface. In a brazing oven, the anode is placed within insulating shell such that the anode conical brazing surface and the shell conical brazing surface are contacting and aligned with each other. During brazing, the cathode is brought into contact with the insulating shell. The sealed emitters are placed in a sputtering machine's vacuum chamber. A metal is sputtered from a sputtering target to form a metal layer on the exterior of insulating shell.
-
公开(公告)号：US06546077B2
公开(公告)日：2003-04-08
申请号：US09760815
申请日：2001-01-17
IPC分类号： H01J3500
CPC分类号： A61N5/1001 , H01J35/32 , H01J2235/164
摘要： An emitter for a miniature X-ray apparatus comprises an insulating shell, an anode, and a cathode. The insulating shell includes a conical brazing surface, brazed to a conical brazing surface on the anode. The braze consists of a pure titanium layer and a pure tin layer. During brazing, the pure metals react and bond to the insulating shell and create a titanium-tin alloy between the pure layers. Pure tin is sputtered from tin sputter target onto the exposed brazing surfaces of the cathode cap and the anode. The insulating shell is placed in a vacuum chamber of deposition applicator, which deposits an active metal onto the shell brazing surface. In a brazing oven, the anode is placed within insulating shell such that the anode conical brazing surface and the shell conical brazing surface are contacting and aligned with each other. During brazing, the cathode is brought into contact with the insulating shell. The sealed emitters are placed in a sputtering machine's vacuum chamber. A metal is sputtered from a sputtering target to form a metal layer on the exterior of insulating shell.
-
公开(公告)号：US06771737B2
公开(公告)日：2004-08-03
申请号：US09902659
申请日：2001-07-12
IPC分类号： H01J3500
CPC分类号： A61N5/1001 , A61N5/1002 , H01J35/32 , H01J2235/062 , H01J2235/164
摘要： A cathode for a miniature X-ray device includes an insulating shell, a cathode and an anode. The cathode includes a focusing cup formed into an end. The focusing cup can include a thin metal layer that conforms to an inner surface of the cathode. An emitting material having a low work function, such as diamond, is deposited directly onto the internal surface of the focusing cup. The anode has a flat receiving surface for collecting electrons emitted from the anode. An interior coating is applied as a circumferential belt on the interior surface of the insulating shell. The interior coating, formed of a negative secondary emission yield material, extends lengthwise in the region of the cathode to an anode gap, covering the region of the insulating shell most likely to be subject to stray electrons emitted from the cathode.
摘要翻译： 用于微型X射线装置的阴极包括绝缘壳，阴极和阳极。 阴极包括形成在一端的聚焦杯。 聚焦杯可以包括符合阴极内表面的薄金属层。 具有低功函数的发射材料（例如金刚石）直接沉积在聚焦杯的内表面上。 阳极具有用于收集从阳极发射的电子的平坦的接收表面。 内部涂层作为周向带施加在绝缘壳体的内表面上。 由负二次发射产生材料形成的内部涂层在阴极的区域中纵向延伸到阳极间隙，覆盖最可能经受从阴极发射的杂散电子的绝缘壳体的区域。
-
公开(公告)号：US06415016B1
公开(公告)日：2002-07-02
申请号：US09756287
申请日：2001-01-09
IPC分类号： H01J3500
CPC分类号： A61N5/1001 , H01J35/32 , H01J2235/164
摘要： An insulating housing shell for a miniature x-ray emitter is provided. The housing shell is cut from a quartz monocrystal which is a suitable material for the insulating housing shell due to its resistivity and dielectric strength properties. The x-ray emitter can be inserted into a subject's body to deliver x-ray radiation. The emitter includes a cable, having a proximal and a distal portion. The insulating housing shell is coupled to the distal portion of the cable, and an anode and a cathode are disposed within the insulating housing shell. The cathode has a granular surface and is operative with the anode and the connector to produce the x-ray radiation. The cathode is composed of a material that also allows it to act as a getter.
摘要翻译： 提供了一种用于微型x射线发射器的绝缘外壳。 壳体由石英单晶切割，由于其电阻率和介电强度特性，绝缘外壳是合适的材料。 X射线发射器可插入受试者的身体以传送X射线辐射。 发射器包括具有近端部分和远端部分的电缆。 绝缘壳体壳体耦合到电缆的远端部分，阳极和阴极设置在绝缘外壳壳体内。 阴极具有颗粒表面并且与阳极和连接器一起工作以产生x射线辐射。 阴极由也可以用作吸气剂的材料组成。
-
公开(公告)号：US06473491B2
公开(公告)日：2002-10-29
申请号：US09748296
申请日：2000-12-21
IPC分类号： H05G134
CPC分类号： A61N5/1001 , H05G1/32
摘要： A method described includes positioning an x-ray emitter at a treatment area, where the x-ray emitter is connected to a cable, setting a voltage source at a source voltage, and measuring a current through the x-ray emitter. The method may include comparing a current flowing through the emitter with a limit and a low limit. The method further includes increasing the source voltage if the current is higher than the high limit. The method includes determining the high limit and the low limit based on the source voltage and the desired radiation. An apparatus of the invention includes an x-ray emitter with a voltage source and a current sensor. The apparatus may include a current comparison device for comparing the measured current with a high limit and a low limit, and further include a voltage source control. A current integrator for integrating a current from the x-ray emitter may also be included.
摘要翻译： 所描述的方法包括将x射线发射器定位在处理区域，其中x射线发射器连接到电缆，将电压源设置为源极电压，并测量通过x射线发射器的电流。 该方法可以包括比较流经发射器的电流与极限和下限。 该方法还包括如果电流高于上限，则增加源极电压。 该方法包括基于源电压和期望的辐射来确定上限和下限。 本发明的装置包括具有电压源和电流传感器的x射线发射器。 该装置可以包括用于将测量的电流与上限和下限进行比较的电流比较装置，并且还包括电压源控制。 还可以包括用于积分来自x射线发射器的电流的电流积分器。
-
-
-
-
搜索结果
5 条记录 (耗时 0.022 秒)
