実験報告書様式（装置グループ利用）

Experimental Report

提出日 Date of Report2013.6.25

実験装置名／ＢＬ番号 Name of Instrument/BLSHARAKU/BL17
実験装置責任者 Name of the person responsible for the instrument:
TAKEDA Masayasu
所属 Affiliation: QuBS, Japan Atomic Energy Agency

１．研究成果概要 （a）装置グループ内の成果、（ｂ）ユーザー課題実装時における特筆すべきサポート、（ｃ）ユーザー課題の執行状況について、まとめてください。A4 サイズ用紙使用のこと。
Outline of your activities. Following results at your instrument should be reported in A4 size papers: (a)results of your instrument group, (b) significant user support works, and (c) statistical summary of user
experiments.
(a) results of BL17 instrument groupa-1 Specular Reflectivity down to 10-7 (unpolarized neutron)
We achieved to measure the specular reflectivity down to the 10-7 order using unpolarized neutrons without any
background subtraction (Fig. 1). The sample is Ni/Ti multilayer on a Si substrate. Each thickness of both Ni and Ti
layer in the bilayers is 5 nm, and the number of the stack is 20. Fringes are clearly observed in the q-region
between qc of the total reflection and the 1st Bragg peak.

.
Fig. 1 Specular reflectivity of a Ni/TI multilayer using unpolarized neutron.

a-2 Performance of polarizing devices (polarizer, analyzer, and spin flipper)
The main beam line components are schematically illustrated in Fig.2. The polarizer consists of 4Qc Fe/Si
polarizing supermirrors which align with double-transmission geometry, and a stack of the same 4 Qc Fe/Si
polarizing supermirrors are used for the analyzer. Two-coil spin flippers are employed to flip the polarized neutron
spin before and after the sample. Figure 3 shows wavelength dependence of flipping ratios (left) and of a productof polarizing efficiency of the polarizer and the analyzer, pp, and flipping efficiencies of the flippers, f1and f2(right).

１．研究成果概要（つづき） Outline of experimental results (continued).

Fig. 2 Schematic drawing of the beam line components of SHARAKU.

Fig. 3 The flipping ratios and the polarization efficiencies (left), and the flipping efficiencies (right).

This figure indicates that all of the polarizer, the analyzer, and the two spin flippers work very well. The
maximum flipping ratio is approximately 50 for the 0.3 nm neutron, and linearly decreases with increasing thewavelength. There is no additional fine structure in the flipping ratios and the efficienies. It enables us to do a
simple data correction.
(b) significant user support works
A 7 T superconducting magnet (SM) has been introduced toMLF. As the first user of this magnet, we conducted the initial
performance test in collaboration with sample environment (SE)team of MLF. We are most grateful to SE team for theirinvaluable

technicalassistance.

Themagnet

successfully

generated magnetic fields up to 70 kOe. Then, polarized neutronreflectivity measurements in a general use program were
performed using this SM at low temperatures.

必要に応じて、A4 サイズの用紙に続きを記入して下さい。
Please use A4-size papers for further reporting, if necessary.

Fig. 4 The 7 T superconducting magnet on
the sample table of SHARAKU.

１．研究成果概要（つづき） Outline of experimental results (continued).
(c) statistical summary of user experiments.
Exp. No.
2012A0053
2012A0068

2012A0085
2012A0091
2012A0098
2012B0055
2012B0144
2012B0163

2012B0177
2012B0155
2012B0069
2012B0076
2012B0095
2012B0162
2012B0140
2012B0139
2012B0128
2012B0131

Start
2012/6/15
2012/5/52012/6/22
2012/11/8
2012/6/27
2012/11/2
2012/6/30
2012/11/6
2012/10/25

10:00 10:00 10:00 10:00 10:00 18:00 10:00 10:00 9:00 -2013/1/24
2012/11/21
2012/12/17
2012/12/20
2013/2/7
2012/12/2
2013/1/13
2012/11/28
2012/12/26
2012/12/25
2012/12/23
2012/12/7
2012/12/10
2013/3/20
2013/3/16
2013/3/19
2012/3/9
2013/3/11
2013/3/13

9:00 21:00 9:00 21:00 21:00 9:00 9:00 21:00 9:00 9:00 9:00 9:00 9:00 9:00 21:00 21:00 9:00 9:00 21:00 -totalday (days) remarks
2012/6/19 22:00 4.5
4.5
2012/5/7 10:0028
2012/6/24 10:00
2
2012/11/12 10:00
4
2012/6/30 10:00
3
6
2012/11/5 18:00
3
2012/7/1 10:00
1
3
2012/11/8 10:00
2
2
2012/11/2 18:00
8
8 10/31a half day
2013A general use total 31.5 days
2013/1/29 9:00
5
5
2012/11/28 9:00
6
6
2012/12/19 9:00
2
6 12/21a half day
2012/12/23 9:00
2
2013/2/9 21:00
2
2012/12/7 9:00
5
7
2013/1/15 9:00
2
2012/12/2 9:00 3.5
3.5
2012/12/27 9:00
1
1 trial use
2012/12/26 9:00
1
1 trial use
2012/12/25 9:00
22 trial use
2012/12/10 9:00
33 reserved
2012/12/12 9:00
28 reserved
2013/3/26 9:00
6
2013/3/19 9:00 2.5
3 reserved
2013/3/20 9:00 0.5
2012/3/11 9:00
2reserved
2013/3/13 9:00
25 reserved
2013/3/16 21:00
3
2013B general use total 50.5 days
2012/6/22 9:00 1.5
3.5
2013/2/7 21:00
2

End

2012I0104 AB

2012/6/20 21:00 2013/2/5 21:00

2012I0017 AB

2012/4/1

0:00 -

2013/4/1

2012P0302 A

2012/6/7
2013/1/15
2013/1/17
2013/1/29
2013/1/30
2013/1/18
2013/1/23
2013/2/27
2013/2/28
2013/3/1
2013/3/2
2013/3/3
2013/3/4
2013/3/5
2013/3/6
2013/3/7
2013/3/8

9:00 9:00 21:00 9:00 21:00 -2012/6/15 9:00 7.5
2013/1/17 9:00
2
2013/1/18 21:00
1
2013/1/30 9:00
1
2013/2/5 9:00 5.5
2013/1/23 9:00 4.5
2013/1/24 9:00 0.5
2013/2/28 9:00 0.5
2013/3/1 9:00 0.5
2013/3/2 9:00 0.5
2013/3/3 9:00 0.5
2013/3/4 9:00 0.5
2013/3/5 9:00 0.5
2013/3/6 9:00 0.5
2013/3/7 9:00 0.5
2013/3/8 9:00 0.5
2013/3/9 9:00 0.5
project use total

B
2012P0803

AB

2013P0903

AB

21:00 21:00 21:00
21:00
21:00
21:00
21:00
21:00
21:00
21:00
21:00
21:00

0:00

必要に応じて、A4 サイズの用紙に続きを記入して下さい。
Please use A4-size papers for further reporting, if necessary.

7.5 6/13 a half day
9.5
0505

27 days