公开(公告)号：US20040240617A1

公开(公告)日：2004-12-02

申请号：US10815041

申请日：2004-03-31

Inventor： Josef Deuringer ,  Jorg Freudenberger ,  Peter Schardt ,  Markus Schild

IPC: H01J035/06 ,  H01J029/46

CPC classification number: G01L21/30 ,  H01J35/02

Abstract: In a method to detect the pressure in an x-ray tube having a cathode of the x-ray tube that is heated with a heater current, and wherein electrons are accelerated between the cathode and an anode by an applied x-ray tube voltage, the heater current is measured, a tube current corresponding to the tube -ray voltage is measured, the difference between the measured heater current and the measured tube current is determined or the temporal change of the measured heater current or of the measured tube current is determined, the difference or the temporal change is compared with predetermined calibration values, and a value representing the pressure in the x-ray tube is determined from the comparison.

Abstract translation: 在用加热器电流加热的X射线管的阴极的X射线管中检测压力的方法中，并且通过施加的X射线管电压在阴极和阳极之间加速电子的方法， 测量加热器电流，测量与管芯电压相对应的管电流，确定测得的加热器电流与测量的管电流之间的差异，或确定测得的加热器电流或测量的管电流的时间变化 ，将差异或时间变化与预定的校准值进行比较，并且从比较确定表示x射线管中的压力的​​值。

公开(公告)号：US20030053595A1

公开(公告)日：2003-03-20

申请号：US10245660

申请日：2002-09-17

Applicant: RIGAKU CORPORATION

Inventor： Takeyoshi Taguchi ,  Katsumi Tsukamoto ,  Masaru Kuribayashi

IPC: H01J035/06

CPC classification number: H01J1/20 ,  H01J9/04 ,  H01J35/06

Abstract: In a hot cathode of an X-ray tube of the kind having a thermoelectronic emitter supported by a heating element, the emitter is comprised of plural emitter regions separated from each other. Each emitter region has the largest measure less than 3 mm, so that no crack occurs on the thermoelectronic emitter. The hot cathode is comprised of a heating element made of glassy carbon and a thermoelectronic emitter supported by the heating element. The emitter is comprised of plural emitter regions made of sintered lanthanum hexaboride. The hot cathode can be produced as described below. The heating element with a thickness of 1 mm is formed, at its thermoelectron-emitting side, with four recesses each of which is 2.6 mm in length, 0.5 mm in width and 0.3 mm in depth. The recesses are filled with lanthanum hexaboride powder, which is then sintered to complete four emitter regions.

Abstract translation: 在具有由发热元件支撑的热电子发射体的X射线管的热阴极中，发射极由彼此分离的多个发射极区域组成。 每个发射极区域具有小于3mm的最大测量值，使得在热电子发射器上不发生裂纹。 热阴极由玻璃碳制成的加热元件和由加热元件支撑的热电子发射体组成。 发射极由多个由烧结镧六硼化物制成的发射极区域组成。 热阴极可以如下所述地制造。 厚度为1mm的加热元件在其热电子发射侧形成四个凹槽，每个凹槽的长度为2.6mm，宽度为0.5mm，深度为0.3mm。 这些凹槽用六硼化镧粉末填充，然后将其烧结以完成四个发射极区域。

公开(公告)号：US20010007587A1

公开(公告)日：2001-07-12

申请号：US09771721

申请日：2001-01-30

Applicant: Hamamatsu Photonics K.K.

Inventor： Kenji Suzuki ,  Tadaoki Matsushita ,  Tutomu Inazuru

IPC: H01J035/06

CPC classification number: H01J35/06 ,  H01J5/52

Abstract: An X-ray tube 1 in which a cathode 73 is heated to emit electrons 80, and the electrons 80 are bombarded against an anode target 32, thereby generating X-rays 81, includes a stem substrate 4 mounted on an opening 22 of a container 21 housing the cathode 73, a plurality of pins 5 extending through the insulating substrate 4 and adapted to supply a voltage into the container 21, and pin covers 6 mounted on the pins 5 in the container 21 and arranged at positions away from a surface of the stem substrate 4 to cover base portions of the pins 5.

Abstract translation: 其中阴极73被加热以发射电子80并且电子80被轰击到阳极靶32，从而产生X射线81的X射线管1包括安装在容器的开口22上的杆基体4 21，其容纳阴极73，多个销5延伸穿过绝缘基板4并适于向容器21中提供电压，以及销盖6，其安装在容器21中的销5上并且布置在远离表面的位置 茎基板4以覆盖销5的基部。