Appendix

Column list from TEMPERATURE SCANS as of Jan. 30,2003
Scattering angle – Q relation and angular spacing of analysers
High Resolution Si(h h h ) monochromator and useful conversions

Column list from TEMPERATURE SCANS as of Jan. 30,2003

Col#	Counter name	Counter meaning	Inv.#
1	Temperature	monot setpoint	-40
2	H		-39
3	K		-38
4	L		-37
5	Epoch		-36
6	sec	integration time	-35
7	pindiode		-34
8	izero OH2	pmoni	-33
9	izero EH1	izero (mon. after ML)	-32
10	Ione/Izero		-31
11	Sec		-30
12	Prema_ad5	NTC mono in	-29
13	Prema_ad6	NTC analyzer #1	-28
14	Prema_ad7	NTC analyzer #2	-27
15	Prema_ad8	NTC analyzer #3	-26
16	Prema_ad9	NTC analyzer #4	-25
17	Prema_ad10	NTC analyzer #5	-24
18	Prema_ad11	NTC analyzer #6	-23
19	Prema_ad12	NTC analyzer #7	-22
20	Prema_ad13	NTC analyzer #8	-21
21	Prema_ad14	NTC analyzer #9	-20
22	Prema_ad16	NTC EH1	-19
23	pico		-18
24	deta1		-17
25	deta2		-16
26	deta3		-15
27	deta4		-14
28	deta5		-13
29	SR current		-12
30	NTC_mono	mono temp. in C	-11
31	Cryostat	T2 (sample) in displex	-10
32	newdet	S(Q)-det near Ana2	-9
33	prema_ad15	PT100 chamber 7m	-8
34	ione	monitor after slits	-7
35	detsq	S(Q) near sample	-6
36	deta6		-5
37	deta7		-4
38	deta8		-3
39	deta9		-2
40	Imirr	monitor before ML	-1

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Scattering angle – Q relation and angular spacing of analysers

Si(8 8 8)

Q [nm^-1] = 4/ * sin(2/2) = 160.3 nm^-1 *sin(2/2)

2 (10 nm^-1) = 7.153° = 0.7839 Å E = 15.816 keV

Si(9 9 9)

Q = 180.35 * sin(2/2)

2 (10 nm^-1) = 6.357° = 0.6968 Å E = 17.794 keV

Si(11 11 11)

Q = 220.414 * sin(2/2)

2 (10 nm^-1) = 5.200° = 0.5701 Å E = 21.7477 keV

Relative tth between analyzers

Maximum momentum transfer and “Q-spacing”

Energy[keV]	Reflection order n	Qmax (7 m)[nm-1]	Q (7 m) [nm-1]	Qmax (12 m)[nm-1]	Q (12 m)[nm-1]
13.840	7	64	1.89	30.3	1.89
15.817	8	74	2.16	35	2.16
17.794	9	83	2.43	39	2.43
21.747	11	101	3.00	47	3.00
23.725	12	111	3.24	52	3.24
25.704	13	120	3.50	56	3.50

Maximum momentum transfer, Q_max, for the 7- and 12-meter section of the spectrometer arm. Q indicates the Q-spacing between adjacent analysers. If the two sections are utilised simultaneously, The Q-spacing is reduced to half of the indicated value.

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High Resolution Si(h h h ) monochromator and useful conversions

Reflection	(7 7 7)	(8 8 8)	(9 9 9)	(11 11 11)	(12 12 12)	(13 13 13)
Wavelength [Å-1]	0.895886	0.7839003	0.6968003	0.5701093	0.52260096	0.48240018
Energy [eV]	13839.35	15816.40	17793.45	21747.556	23724.572	25701.6568
Conversion meV -> K	0.02822	0.02470	0.02195	0.01796	0.01646	0.01520
(E)M [meV]	5.3	4.4	2.2	1.02	0.73	0.5
(E/E)M	3.8*10-7	2.8*10-7	1.2*10-7	4.7*10-8	3.0*10-8	2.0*10-8
Conversion angles -> nm-1	140.265	160.306	180.344	220.424	240.459	260.497
QMax [Å-1] (for 7m arm)	5.93	6.77	7.62	9.32	10.16	11.00
Flux [ph/s 200 mA]	7*1010	6*1010	1.8*1010	4.4*1010	3.9*1010	9.8*1010

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