SKA Working Group 8 Level-1 Science: IGM Thermal

Thermal ICM component: SZ effect on arcsec scale, to derive detailed structure of thermal intracluster medium, and to detect the SZ effect arising from quasar-driven blast waves during the preheating phase of the intracluster medium.

Additional notes: WG8 Bologna ; WG8 pre-Groningen ;WG8 post-Groningen

HARD 'NO' for China: Upper frequency limit of antennas
HARD 'NO' for Europe: Fundamental upper frequency limit of antennas
HARD 'NO' for Ozlens: Fundamental upper frequency limit of antennas

SKA Designs (requirements matrix)

Red=All agreed that it fails; Dark Blue=some says it fails; Pink=most say it fails.
*Specification*	*Requirement*	*China*	*Europe*	*India*	*Ozlens*	*Ozcyli*	*USA*	*Canada*
A/Tsys		35000	10500	20000	20000	20000	20000	20000
FOV (deg2)		0.005	1	1	3.6	1 (8)	1	1(FPA)
#beams		1	8	1	2	8 (64)	1	350
beam separation			90		150	40x1		1
#subarrays	many	few	many	many	many	many	many	few?
response time		100	<1	60	60	60	60	100
Freq range	10-36	0.3-6.0	0.15-1.5	0.15-10.0	0.1-5.0	0.10-9.0	0.15-34.0	0.1-22.0
Corr Bandwith		?	0.2		3.0	2.4	3.2	4.0
#spectral channels			2x4096		2x4096	2x4096	16384
sampling time							short
max baseline	5000	300	2000		3000	10000	5000
50% area baseline		50	100		4	3	35
Tb sensitivity		?	1	1	0.7		1
#independent IFs			3		4		4	4
Max sep. of IFs			1				full band	full band
Spatial DNR		1e+05		1e+06		1e+06	1e+06	1e+06
Spectral DNR
Polarization DNR				1e+04			1e+04
#spatial pixels				1e+08		1e+08	5e+10