Vacuum layout

A schematic layout of the beamline vacuum system is shown in Fig. 5.1. Valves ending with i are for the inboard (X1A2) branch, and valves ending with o are for the outboard branch. The gauges and gauge controllers in the beamline are listed in Table 5.1, and the ion pumps and controllers are listed in Table 5.2.

Figure 5.1: Schematic layout of the X-1A beamline. The upstream portion of the beamline is shown at top, and the downstream portion is shown at bottom (with some overlap between the two views).

Table 5.1: Gauges and gauge controllers.

Ion	Penning	Conv.			Inter-
gauge	gauge	gauge	Location	Controller	locked?
IGFE			Front end	GP 271	yes
IG1			LBL mirror chamber	GP 271	yes
		CG1
IG2			X-1B mirror chamber	GP 303 (w/IG3B)	yes
IG3			M1o chamber	GP 303 (w/IG4)	yes
		CG3
IG4			M1i chamber	GP 303 (w/IG3)	yes
		CG4
IG5i			EnSi chamber	GP 303 (w/IG6i)	yes
IG6i			SGMi chamber	GP 303 (w/IG5i)	yes
		CG6i
IG7i			Upstream of P7i, ExSi	(share IG8i)
		CG7i
IG8i			Upstream of ExSi	PE DGC III	yes
		CG8i
IG9i			Downstream of ExSi	PE DGC III	yes
		CG9i
		CG10i	Holography/diffraction experiment	GP 275	yes
IG11i			SPEM chamber	PE DGC III	yes
IG5o			Outboard branch grating mask chamber	GP 303 (w/IG6o)	yes
IG6o			SGMo chamber	GP 303 (w/IG5o)	yes
		CG6o
IG7o			Upstream of pump P6o, ExSo	PE DGC III
		CG7o
IG8o			Upstream of ExSo	PE DGC III	yes
		CG8o
	PG9o		Downstream of ExSo	CVC Penthervac	yes
		CG9o		GP 275
		CG10o	Developmental STXM	GP 275	yes
	PG11o		CryoSTXM
		CG11o		GP 275	yes

Table 5.2: Ion pumps and controllers

Name	Location	Controller
P1	LBL mirror chamber	PE CVIPC
P2	X1B mirror chamber
P3	M1o chamber	PE CVIPC
P4	M1i chamber	PE Digitel 500
P5i	EnSi chamber	PE Digitel 500
P6i	SGMi chamber	PE Digitel 500
P7i	Upstream of ExSi	PE Ion-Pak
P8i	Downstream of ExSi	PE Digitel 500
P$_{\rm SPEM}$	SPEM chamber	PE CVIPC
P5o	SGMo chamber	PE Digitel 500
P6o	Upstream of ExSo	PE CVIPC
P7o	Downstream of ExSo	PE Digitel 500
P$_{\rm Cryo}$	Cryo chamber	PE Digitel 500