H05GX-RAY TECHNIQUE investigating or analysing materials by the use of X-rays G01N23/00; apparatus for X-ray photography G03B42/02; X-ray tubes H01J35/00; TV systems having X-ray input H04N5/321The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: H05G1/61 covered by H05G1/60In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. H05G1/00 H05G1/00X-ray apparatus involving X-ray tubesCircuits therefor H05G1/02Constructional details H05G1/025Means for cooling the X-ray tube or the generator H05G1/04Mounting the X-ray tube within a closed housing H05G1/06X-ray tube and at least part of the power supply apparatus being mounted within the same housing H05G1/08Electrical details H05G1/085Circuit arrangements particularly adapted for X-ray tubes having a control grid H05G1/10Power supply arrangements for feeding the X-ray tube supply circuits with converters in general H02M; supply circuits for emitters and amplifiers H04B1/16 - H04B1/1623 H05G1/12with dc or rectified single-phase ac or double-phase H05G1/14with single-phase low-frequency ac also when a rectifer element is in series with the X-ray tube H05G1/16Reducing the peak-inverse voltage H05G1/18with polyphase ac of low frequency rectified H05G1/20with high-frequency acwith pulse trains pulse generators in general H03K3/00, H03K4/00 H05G1/22with single pulses H05G1/24Obtaining pulses by using energy storage devices H05G1/26Measuring, controlling or protecting measuring X-ray radiation G01T H05G1/265Measurements of current, voltage or power H05G1/28Measuring or recording actual exposure timeCounting number of exposuresMeasuring required exposure time H05G1/30Controlling H05G1/32Supply voltage of the X-ray apparatus or tube H05G1/34Anode current, heater current or heater voltage of X-ray tube H05G1/36Temperature of anodeBrightness of image power electrical temperature regulating in general G05D23/19 H05G1/38Exposure time time switches in general H01H43/00 and subgroups H05G1/40using adjustable time-switch H05G1/42using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube H05G1/44in which the switching instant is determined by measuring the amount of radiation directly dosimetry in general G01T1/02 H05G1/46Combined control of different quantities, e.g. exposure time as well as voltage or current H05G1/48Compensating the voltage drop occurring at the instant of switching-on of the apparatus H05G1/50Passing the tube current only during a restricted portion of the voltage waveform H05G1/52Target size or shapeDirection of electron beam, e.g. in tubes with one anode and more than one cathode H05G1/54Protecting or lifetime predictionoverload protection combined with control H05G1/46 H05G1/56Switching-onSwitching-off H05G1/58Switching arrangements for changing-over from one mode of operation to another, e.g. from radioscopy to radiography, from radioscopy to irradiation or from one tube voltage to another H05G1/60Circuit arrangements for obtaining a series of X-ray photographs or for X-ray cinematography H05G1/62Circuit arrangements for obtaining X-ray photography at predetermined instants in the movement of an object, e.g. X-ray stroboscopy H05G1/64Circuit arrangements for X-ray apparatus incorporating image intensifiers H05G1/66Circuit arrangements for X-ray tubes with target movable relatively to the anode H05G1/68Circuit arrangements for Lilienfield tubesCircuit arrangements for gas-filled X-ray tubes H05G1/70Circuit arrangements for X-ray tubes with more than one anodeCircuit arrangements for apparatus comprising more than one X ray tube or more than one cathode H05G1/58 takes precedence H05G2/00Apparatus or processes specially adapted for producing X-rays, not involving X-ray tubes, e.g. involving generation of a plasma X-ray lasers H01S4/00 H05G2/001X-ray radiation generated from plasma plasma for generation of electrons to be accelerated towards an anode H01J35/00 H05G2/003being produced from a liquid or gas H05G2/005containing a metal as principal radiation generating component H05G2/006details of the ejection system, e.g. constructional details of the nozzle H05G2/008involving a beam of energy, e.g. laser or electron beam in the process of exciting the plasma