Main Parameters

Storage Ring Parameters

	Notation	Model Value
General Parameters
Nominal energy	$E_0$	$7.0$	GeV
Maximum energy	$E_m$	$7.7$	Gev
Nominal circulating current, multibunch	$I_{nmb}$	$100.0$	mA
Nominal stored electrons, multibunch	$N$,$q$	$2.3\times10^{12},\; 3.7\times10^2$	electrons, nC
Maximum curculating current, multibunch	$I_{mmb}$	$300$	mA
Maximum stored electrons, multibunch	$N$,$q$	$6.9\times10^{12}, \; 1.1\times10^3$	electrons, nC
Nominal circulating current, single bunch	$I_{nsb}$	$5$	mA
Nominal stored electrons, single bunch	$N$,$q$	$1.2\times10^{11},\; 19$	electrons, nC
Number of periods	$N_p$	$40$
Transverse parameters
Transverse tune	$\nu_x, \nu_y$	$36.20, \; 19.27$
Natural chromaticity	$\xi_{x,n}, \xi_{y,n}$	$-90.37, \; -43.28$
Dispersion function	$\eta_{x,\textrm{max}}, \eta_{y,\textrm{max}}$	$0.22, \; 0.00$	m
Beta function	$\beta_{x,\textrm{min}}, \beta_{y,\textrm{min}}$	$1.10, \; 2.87$	m
	$\beta_{x,\textrm{ave}}, \beta_{y,\textrm{ave}}$	$13.15, \; 16.07$	m
	$\beta_{x,\textrm{max}}, \beta_{y,\textrm{max}}$	$29.21, \; 29.09$	m
Longitudinal parameters
Circumference	$C$	$1104.000$	m
Revolution frequency	$f_0$	$271.554$	kHz
Revolution time	$T_0$	$3.682$	$\mu$s
Harmonic number	$h_\textrm{rf}$	$1296$
Typical RF voltage	$V_0$	$9.5$	MV
Typical synchronous phase	$\phi_s$	$2.54,\; 145.48$	Radian,Degree
Momentum compaction factor	$\alpha_c$	$2.82 \times 10^{-4}$
Longitudinal tune (at 9.5MV)	$\nu_s$	$0.008$
Radiation parameters
Radiation energy loss (dipole)	$U_{r,d}$	$5.353$	MeV
Critical photon energy (dipole)	$E_{c}$	$19.5$	keV
Partition number	$D$	$-5.027 \times 10^{-4}$
Damping Time	$\tau_x$	$9.626$	ms
	$\tau_y$	$9.631$	ms
	$\tau_E$	$4.817$	ms
Equilibrium momentum spread (zero current)	$\sigma_{\delta}$	$0.096$	%
Equilibrium bunch length (zero current)	$\sigma_{t}$	$19.544$	ps
	$\sigma_z$	$5.859$	mm
Natural emittance	$\epsilon_n$	$2.514$	nm-rad
Effective emittance at ID location$^1$	$\epsilon_{eff}$	$3.129$	nm-rad
Radiation integrals	$I_1$	$0.311$	m
	$I_2$	$0.158$	m$^{-1}$
	$I_3$	$4.017 \times 10^{-3}$	m$^{-2}$
	$I_4$	$-7.961 \times 10^{-5}$	m$^{-1}$
	$I_5$	$5.539 \times 10^{-6}$	m$^{-1}$

$^1$	Effective emittance - characterizes local beam emittance by taking electron energy spread into account: ${\epsilon_{eff}}^2 = \sigma_x \times \sigma_{x'} = (\epsilon_n \cdot \beta_x + (\eta_x \delta E)^2) \times (\epsilon_n \cdot \gamma_x + (\eta_x' \delta E)^2)$