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91. Calculate the long-wavelength limit of the sensitivity of a photocathode layer with work function of 1.5 eV. 9.2. Find the transit time for an electron between typical dynodes in a PM tube if the interdynode spacing is 12 mm and the potential difference is 150 V per stage. For simplicity, assume a uniform electric field. 9.3. Using the data plotted in Fig. 9-3, find the total applied voltage necessary for a PM tube with a six-stage multiplier using GaP(Cs) dynodes to achieve an electron gain factor of $10^6$. 9-4. The dark current from a PM tube with electron gain of $10^6$ is measured to be 2 nA. What is the corresponding electron emission rate from the photocathod?

          91. Calculate the long-wavelength limit of the sensitivity of a photocathode layer with
work function of 1.5 eV.
9.2. Find the transit time for an electron between typical dynodes in a PM tube if the
interdynode spacing is 12 mm and the potential difference is 150 V per stage. For
simplicity, assume a uniform electric field.
9.3. Using the data plotted in Fig. 9-3, find the total applied voltage necessary for a PM
tube with a six-stage multiplier using GaP(Cs) dynodes to achieve an electron gain
factor of $10^6$.
9-4. The dark current from a PM tube with electron gain of $10^6$ is measured to be 2 nA.
What is the corresponding electron emission rate from the photocathod?

91. Calculate the long-wavelength limit of the sensitivity of a photocathode layer with
work function of 1.5 eV.
9.2. Find the transit time for an electron between typical dynodes in a PM tube if the
interdynode spacing is 12 mm and the potential difference is 150 V per stage. For
simplicity, assume a uniform electric field.
9.3. Using the data plotted in Fig. 9-3, find the total applied voltage necessary for a PM
tube with a six-stage multiplier using GaP(Cs) dynodes to achieve an electron gain
factor of 10^6.
9-4. The dark current from a PM tube with electron gain of 10^6 is measured to be 2 nA.
What is the corresponding electron emission rate from the photocathod?

Added by Mireia C.

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