Electron Multiplying Charge
... preferred in low-light applications. There are two major disadvantages to EMCCD technology. First, it is not possible to quickly gate the device, limiting its high speed resolution. ICCD technology is able to gate in picosecond ranges, while EMCCD technology is only as fast as microsecond gating. Th ...
... preferred in low-light applications. There are two major disadvantages to EMCCD technology. First, it is not possible to quickly gate the device, limiting its high speed resolution. ICCD technology is able to gate in picosecond ranges, while EMCCD technology is only as fast as microsecond gating. Th ...
Basic Electrical Ideas Understanding electrical ideas is
... charge on it. The electric field moves the electrons around the wires in the circuit. The electric field direction is from the positive of the battery to the negative. Do the electrons move quickly? Surprisingly the answer is No. The electrons drift along quite slowly, usually only a few millimetres ...
... charge on it. The electric field moves the electrons around the wires in the circuit. The electric field direction is from the positive of the battery to the negative. Do the electrons move quickly? Surprisingly the answer is No. The electrons drift along quite slowly, usually only a few millimetres ...
LASER Q-SWITCHING
... LASER Q-SWITCHING-GIANT PULSES The output of a normal mode, pulsed, solid-state laser is generally a train of irregular pulsations—irregular in peak power, pulse width and frequency of occurrence. It is possible to remove these irregularities and at the same time greatly increase the peak power by a ...
... LASER Q-SWITCHING-GIANT PULSES The output of a normal mode, pulsed, solid-state laser is generally a train of irregular pulsations—irregular in peak power, pulse width and frequency of occurrence. It is possible to remove these irregularities and at the same time greatly increase the peak power by a ...
3B SCIENTIFIC® PHYSICS
... • Turn on the high-tension power supply. • Energise the Helmholtz coils and observe the path of the beam. The path of the luminous beam is circular, the deflection being in a plane perpendicular to the electromagnetic field. At fixed anode voltage the radius decreases with increasing coil current. W ...
... • Turn on the high-tension power supply. • Energise the Helmholtz coils and observe the path of the beam. The path of the luminous beam is circular, the deflection being in a plane perpendicular to the electromagnetic field. At fixed anode voltage the radius decreases with increasing coil current. W ...
5029 Register Number - Part III_PHYSICS (English Version) Time
... 7) If the wavelength of the light is reduced to one fourth then the amount of scattering is, a) Increased by 16 times b) decreased by 16 times c) increased by 256 ties d) decreased by 256 times 8) The refractive index of the medium for the polarizing angle 60 degree is, a) 1.732 b) 1.414 c) 1.5 d) 1 ...
... 7) If the wavelength of the light is reduced to one fourth then the amount of scattering is, a) Increased by 16 times b) decreased by 16 times c) increased by 256 ties d) decreased by 256 times 8) The refractive index of the medium for the polarizing angle 60 degree is, a) 1.732 b) 1.414 c) 1.5 d) 1 ...
Lecture 10 Monday February 9
... We know energy is being lost, for example as heat and light in a light bulb. • What is flowing? – Electrons in metals – Average velocity very low because so many – Collisions with ions cause energy loss so velocity on the average is constant even though E field is always accelerating the electrons. ...
... We know energy is being lost, for example as heat and light in a light bulb. • What is flowing? – Electrons in metals – Average velocity very low because so many – Collisions with ions cause energy loss so velocity on the average is constant even though E field is always accelerating the electrons. ...
Klystron
A klystron is a specialized linear-beam vacuum tube, invented in 1937 by American electrical engineers Russell and Sigurd Varian, which is used as an amplifier for high radio frequencies, from UHF up into the microwave range. Low-power klystrons are used as oscillators in terrestrial microwave relay communications links, while high-power klystrons are used as output tubes in UHF television transmitters, satellite communication, and radar transmitters, and to generate the drive power for modern particle accelerators.In the klystron, an electron beam interacts with the radio waves as it passes through resonant cavities, metal boxes along the length of the tube. The electron beam first passes through a cavity to which the input signal is applied. The energy of the electron beam amplifies the signal, and the amplified signal is taken from a cavity at the other end of the tube. The output signal can be coupled back into the input cavity to make an electronic oscillator to generate radio waves. The gain of klystrons can be high, 60 dB (one million) or more, with output power up to tens of megawatts, but the bandwidth is narrow, usually a few percent although it can be up to 10% in some devices.A reflex klystron is an obsolete type in which the electron beam was reflected back along its path by a high potential electrode, used as an oscillator.The name klystron comes from the stem form κλυσ- (klys) of a Greek verb referring to the action of waves breaking against a shore, and the suffix -τρον (""tron"") meaning the place where the action happens. The name ""klystron"" was suggested by Hermann Fränkel, a professor in the classics department at Stanford University when the klystron was under development.