SRF Cavity Surface Resistance Calculator

Particle Accelerators: Calculate BCS surface resistance ($R_{BCS}$), residual resistance ($R_{res}$), cavity quality factor ($Q_0$), and dynamic cryogenic dissipation ($P_{diss}$).

Cavity RF & Material Parameters

RF Frequency $f$ (MHz):

Operating Temperature $T$ (K):

Accelerating Gradient $E_{acc}$ (MV/m):

Active Cavity Length $L$ (m):

Geometric Factor $G$ ($Omega$):

Shunt Impedance $R/Q$ ($Omega$):

Residual Resistance $R_{res}$ ($nOmega$):

RF Surface Loss & Cryogenic Load

Quality Factor ($Q_0$)

Total Resistance ($R_s$)

-- nΩ

Cryo Dissipation ($P_{diss}$)

-- W

Wall AC Grid Power

-- kW

BCS vs Residual Breakdown

• BCS Surface Resistance ($R_{BCS}$): -- nΩ

• Cavity Accelerating Voltage ($V_{acc} = E_{acc} L$): -- MV

• Cryogenic COP Carnot Multiplier (at 2.0 K): ~750 W electrical per 1 W cryogenic

• Dissipated Power per Active Meter: -- W/m

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SRF Cavity Surface Resistance Calculator

Cavity RF & Material Parameters

RF Surface Loss & Cryogenic Load

BCS vs Residual Breakdown

Frequently Asked Questions