Useful numbers

Electron Charge
1 coulomb(C) = 1 A·s = 6.242e+18 electrons

1 μA = 6.242e+12 electrons/s

1 nA = 6.242e+9 electrons/s

1 pA = 6.242e+6 electrons/s

1 fA = 6.242e+3 electrons/s

1 e= 1.602176634e−19 C ( SI definition 2019, exact)

1 mole = 6.02214076e+23 ( SI definition 2019, exact)

Therefore:

1 mole electron = 1.602176634e−19 × 6.02214076e+23 ≈ 96485.3 C

Electron energy and speed
Speed of light c = 299792458 m/s 

Planck's constant h = 6.62607004e-34 m2·kg/s

Electron rest(invariant) mass m0 = 9.10938356(11)e−31 kg ≈ 5.49e−4 dalton

Electron m0c2 = 8.18711e-14 J

E = eV + m0c2 = mc2

v = sqrt (1 - (m0c2/mc2)2) = sqrt (1 - (m0/m)2) ) p = mv

λ = p/h

MFP: mean free path

1 Russo & Passmore 2016

online calculator

Permeability of vaccuum
μ0 = 4π × 1e−7 H/m ≈ 12.57e−7 H/m ( SI definition 2019, exact)

Permittivity of vaccuum
ε0 = 8.85e−12 F/s (derived from μ0 and speed of light ε0 = 1/sqrt(μ0 * ε0))

Conductivity of relevant materials
Source: https://en.wikipedia.org/wiki/Electrical_resistivity_and_conductivity

Pressure
1 Pa = 1 N/(m2) ≈ 1e-5 atm

1 bar = 10e5 Pa ≈ 0.977 atm

1 mbar = 100 Pa ≈ 0.001 atm

1 mbar ≈ 0.75006 Torr

1 bar ≈ 14.50377 psi

1 atm = 101325 Pa (1.01325 bar) = 0.101325 MPa = 760 Torr (All exact, by definition)

1 atm ≈ 14.69595 psi

1 Torr = 1mm Hg = 1/760 ATM ≈ 133.32 Pa

1 psi ≈ 6895 Pa

Properties of cryogens
Sources:

https://www.engineeringtoolbox.com/nitrogen-d_1421.html

https://www.engineeringtoolbox.com/methane-d_1420.html

https://www.engineeringtoolbox.com/ethane-d_1417.html

https://www.engineeringtoolbox.com/propane-d_1423.html

https://en.wikipedia.org/wiki/Liquid_nitrogen

https://en.wikipedia.org/wiki/Ethane

https://en.wikipedia.org/wiki/Propane

L120C Electron flux with LaB6 filament
nP, Parallel illumination (37.4% for spot 5)

70 um C2 aperture: illuminated area = 10 um2 (3.6 um diameter)

Ceta 16M camera
4096 x 4096 pixel CMOS, 16 bit, fiber optic-coupled scintillator

14 um pixel, 6cm x 6cm frame

Frame rate
4k × 4k 1 fps

2k × 2k 8 fps

1k × 1k 18fps

512 × 512 25fps

Imaging performance in 2k ×2k mode
DQE @ 0.5 Nyquist  >8% @300 kV >12%@200 kV

MTF @ 0.5 Nyquist  >25%@300 kV >35%@200 kV

Duty cycle in movie mode
99% in rolling shutter mode

Movie mode shuttering
Electronic (rolling shutter) or TEM shutter (camera controlled)

Conversion efficiency
9 counts/primary electron (typical) @200 kV

6 counts/primary electron (typical) @300 kV

Readout speed
320 Megapixel/s (32 port readout at 10 Megapixel/port)

Datasheet
https://static.miraheze.org/emtorontowiki/b/bb/Ceta_16M_Datasheet.pdf

Hexagonal ice
Space group P63/mmc, Unit cell: a = 4.501 Å, c = 7.348 Å

References: https://www.nature.com/articles/1881144a0.pdf http://www1.lsbu.ac.uk/water/hexagonal_ice.html https://www.cambridge.org/core/services/aop-cambridge-core/content/view/7F1501FEC2F114A74D3E51252DD261AE/9780511897504c1_p1-66_CBO.pdf/structure_of_iceih.pdf https://www.cambridge.org/core/journals/journal-of-glaciology/article/hexagonal-and-cubic-ice-at-low-temperatures/B4D0A2CE9AAA95FF2441D498D33DC2C8/core-reader

cubic ice
Face-centered cubic, Space group 227, F d -3 m, a = 6.355 Å

References: https://www.nature.com/articles/1881144a0.pdf http://www1.lsbu.ac.uk/water/cubic_ice.html https://www.cambridge.org/core/journals/journal-of-glaciology/article/hexagonal-and-cubic-ice-at-low-temperatures/B4D0A2CE9AAA95FF2441D498D33DC2C8/core-reader