Differences between revisions 1 and 92 (spanning 91 versions)

Viewport windows

Related subgroups: IOO, MIF, VAC, CRY, VIS...

Contents

Viewport windows
1. Viewport windows for main beams
2. Viewport windows for optical levers (Oplevs)
  1. FY2013 version
  2. FY2017 version

Viewport windows for main beams

Category	Functions	Chambers	Wavelengths	Status
A	LASER_INJECTION	At the duct connecting PSL room and MCF	1064	Installed.
A	IMC_REFL	MCF	1064	Installed.
D	IMC_END_TRANS	MCE	1064	Installed.
A	CARM	IFI	1064	Installed.
C	POP/GreenX	PR2	532/1064	Installed.

Viewport windows for optical levers (Oplevs)

FY2013 version

VPZ100Q-BBAR530-1100 (ICF152) : Technoport

In total there are 40 pcs of this kind viewport window. Be noted that

You need smaller M8 washers (stocked in the AOS's rack) to escape the front-inner ring of the viewport.
I don't like the screws that is fixing(?) the front-inner ring are loosen! even thought they all passed the leak test. Please tighten them 5Nm torque (I don't have any evidence on this number whether it is ok for glass breaking).

Serial#	Status
0000	Leaking, but preserved in the tunnel -> Returned to the retailer (20170425) -> Renewed one delivered in Kamioka (20170714) -> Installed at PR3 (20170721)
0001	Leaking, but preserved in the tunnel -> Returned to the retailer (20170425) -> Renewed one delivered in Kamioka (20170714) -> Installed at IFI (20170721)
0002	Not exists
0003	Not exists
0004	Not exists
0005	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170601) -> Installed at MCF (20170605) [No leak detected on 20170725]
0006	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170601) -> Installed at MCF (20170605) [No leak detected on 20170725]
0007	Leaking, but preserved in the tunnel -> Get back to the retailer (20170425) -> Renewed one delivered in Kamioka (20170821)
0008	Leaking; was once installed IXC, returned in advanced, and checked at the company -> Renewed one delivered in Kamioka (20170601) -> Installed at MCE (20170605) [No leak detected on 20170725]
0009	No leak; stocked at the side of IMC -> Returned to the retailer (20170718) -> Renewed one delivered in Kamioka (20171003) -> Installed at PRM (20171004)
0010	No leak; stocked at the side of IMC -> Returned to the retailer (20170718) -> Renewed one delivered in Kamioka (20171003) -> Installed at PRM (20171004)
0011	No leak; stocked at the side of IMC -> Returned to the retailer (20170718) -> Renewed one delivered in Kamioka (20171003)
0012	No leak; stocked at the side of IMC -> Returned to the retailer (20170718) -> Renewed one delivered in Kamioka (20171003)
0013	No leak; stocked at the side of IMC Returned to the retailer (20170718) -> Renewed one delivered in Kamioka (20171003)
0014	Not yet checked; was once installed EXA, preserved at the side of IMC -> Returned to the retailer (20170425) -> Renewed one delivered in Kamioka (20170821)
0015	Not yet checked; was once installed EXA, preserved at the side of IMC -> Returned to the retailer (20170425) -> Renewed one delivered in Kamioka (20170821)
0016	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170601) -> Installed at MCE (20170605) [No leak detected on 20170725]
0017	Not yet checked nor opened; preserved at the side of IMC -> Returned to the retailer (20170425) -> Renewed one delivered in Kamioka (20170821)
0018	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170601) -> Installed at PR2 (20170725)
0019	MCE, Leaking (20170303) -> Returned to the retailer (20170606)-> Renewed one delivered in Kamioka (20171003) -> Installed at SR3 (20180724)
0020	MCF, Leaking (20170303) -> Returned to the retailer (20170606)-> Renewed one delivered in Kamioka (20171003)-> Installed at SR3 (20180724)
0021	PR3, Not yet checked. -> Returned to the retailer (20170726)-> Renewed one delivered in Kamioka (20171003)
0022	MCE, No Leak detected (20170303) -> Returned to the retailer (20170606)-> Renewed one delivered in Kamioka (20171003)
0023	Preserved in a desiccator at PSL room, for some reasons, not yet checked. -> Returned to the retailer (20170425)-> Renewed one delivered in Kamioka (20170821)
0024	MCF, No Leak detected (20170303) -> Returned to the retailer (20170606) -> Renewed one delivered in Kamioka (20171003)
0025	Not yet checked; was once EYA; preserved at the side of IMC. -> Returned to the retailer (20170425) -> Renewed one delivered in Kamioka (20170821)
0026	BS, not yet checked. -> Returned to the retailer (20170726) -> Renewed one delivered in Kamioka (20171113)
0027	BS, not yet checked. -> Returned to the retailer (20170726) -> Renewed one delivered in Kamioka (20171113)
0028	Leaking; was once installed EYC probably, returned in advanced, and checked at the company-> Renewed one delivered in Kamioka (20171003)
0029	Not yet checked; was once EYA; preserved at the side of IMC.-> temporally Installed at PR2? for checking oplev.?? -> Returned to the retailer (20170726) -> Renewed one delivered in Kamioka (20171113)
0030	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170601) -> Installed at EYC (20170714 and see here)
0031	Reverse pressured. -> Renewed one delivered in Kamioka (20170601) -> Installed at EYC ( 20170714 and see here)
0032	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170601)
0033	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170630) -> Installed at BS (20170724)
0034	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170630) -> Installed at BS (20170724)
0035	Leaking; was once installed EYC probably, returned in advanced, and checked at the company -> Renewed one delivered in Kamioka (20170630) -> Installed at IMM (20170725)
0036	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170630)
0037	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170630)
0038	Reverse pressured. -> Renewed one delivered in Kamioka (20170714)
0039	Break by reverse pressure (see an attached picture of an e-mail to me from Uchiyama-san on 14 Mar 2016)
0040	Leaking, get back to the retailer (20170130) -> Renewed one delivered in Kamioka (20170714)
0041	IMM, not yet checked. -> Returned to the retailer (20170726) -> Renewed one delivered in Kamioka (20171113)
0042	Reverse pressured. -> Renewed one delivered in Kamioka (20170714)

VPZ38Q (ICF70) : Technoport

Serial#	Status
001	Leaking; was once installed IXA -> Returned to the retailer (20170606) -> Renewed one delivered in Kamioka (20170714) -> Installed at IXA (20180612)
002	Leaking; was once installed IXA -> Returned to the retailer (20170606) -> Renewed one delivered in Kamioka (20170714)
003	PR3, not yet checked.-> Returned to the retailer (20170726) [and will be stocked in the retailer.]
004	Leaking, in the manufacture -> Renewed one delivered in Kamioka (20170714)
005	Leaking, in the manufacture -> Renewed one delivered in Kamioka (20170601) -> Installed at EYA (20170713)
006	Leaking, in the manufacture -> Renewed one delivered in Kamioka (20170601) -> Installed at EYA (20170713)
007	Leaking, but preserved in the tunnel; was once installed EYA, and leak detected -> Returned to the retailer (20170606) -> Renewed one delivered in Kamioka (20170714)
008	Leaking, but preserved in the tunnel; was once installed EYA, and leak detected -> Returned to the retailer (20170606) -> Renewed one delivered in Kamioka (20170714)
009	Leaking, in the manufacture -> Renewed one delivered in Kamioka (20170601)
010	No leak probably; stocked at the side of IMC. -> Returned to the retailer (20170606) -> Renewed one delivered in Kamioka (20170714)
011	Newly Renewed one, based on a stocked one in the retailer, delivered in Kamioka (20170714) -> Installed at PR3 (20170721)

FY2017 version

Once delivered in the end of December 2016, but their quality are out of question, and with unbelievable delay the company will finally seriously deliver (hopefully) new ones. Firstly those viewport windows were newly ordered for cryostats according to CRY's new demands in FY2016, but, due to the delay described above, usable ones are not in time delivered, so two companies oplev ICF152 viewport windows would be mixedly exiting, which I would like to totally avoid from the viewpoints of engineering management.

Anyway, they have been delivered and stocked in a shelf at the side of the IMC duct; see this.

In total 20 pcs of ICF152. http://klog.icrr.u-tokyo.ac.jp/osl/?r=4056 http://klog.icrr.u-tokyo.ac.jp/osl/?r=4070

Serial#	Status
01	xxxx
02	Installed at EXC (20180412)
03	xxxx
04	xxxx
05	xxxx
06	xxxx
07	xxxx
08	xxxx
09	xxxx
10	xxxx
11	xxxx
12	xxxx
13	xxxx
14	Installed at EXC (20180322)
15	xxxx
16	xxxx
17	Installed at EXC (20180322)
18	xxxx
19	xxxx
20	xxxx

LCGT/subgroup/AOS/Viewport2017 (last edited 2022-10-06 13:35:26 by TomotadaAkutsu)

-  ⇤ ← Revision 1 as of 2017-01-31 11:07:28 → 
  Size: 243
  Editor: TomotadaAkutsu
  Comment:
+   ← Revision 92 as of 2018-07-25 07:30:23 → ⇥
  Size: 12306
  Editor: TomotadaAkutsu
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-= Viewports =
+= Viewport windows =
 Line 3:
-Line 4:
+Line 5:
-'''[[KAGRA/Subgroups/AOS| back to AOS top]]'''
'''[[KAGRA/Subgroups/AOS/Viewport1| Obsolete information]]'''
+ * [[KAGRA/Subgroups/AOS|back to AOS top]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=6118|Leak information]]
 * [[LCGT/subgroup/AOS/Viewport1|Obsolete information]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5333|Obsolete information 2]]
-Line 8:
+Line 11:
+== Viewport windows for main beams ==
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1807|Very basic information]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2644|Very high quality]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2927|Cat.D and H]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2926|Cat.F and G]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=6728|Cat.J]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=6811|Cat.K]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2928|Adapter]]
||Category ||Functions||Chambers||Wavelengths ||Status ||
||A        ||LASER_INJECTION||At the duct connecting PSL room and MCF || 1064 || Installed.||
||A        ||IMC_REFL|| MCF    || 1064 || Installed.||
||D       ||IMC_END_TRANS || MCE|| 1064 || Installed.||
||A        ||CARM      ||IFI    || 1064|| Installed.||
||C        ||POP/GreenX||PR2    || 532/1064 || Installed.||
-Line 9:
+Line 26:
-== Scope ==
 . Scope...
+== Viewport windows for optical levers (Oplevs) ==
=== FY2013 version ===
==== VPZ100Q-BBAR530-1100 (ICF152) : Technoport ====
In total there are 40 pcs of this kind viewport window. Be noted that
 * You need smaller M8 washers (stocked in the AOS's rack) to escape the front-inner ring of the viewport.
 * I don't like the screws that is fixing(?) the front-inner ring are loosen! even thought they all passed the leak test. Please tighten them 5Nm torque (I don't have any evidence on this number whether it is ok for glass breaking).
||Serial# ||Status ||
||0000 ||Leaking, but preserved in the tunnel -> Returned to the retailer (20170425) -> '''Renewed''' one delivered in Kamioka (20170714)  -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3140|PR3]] (20170721) ||
||0001 ||Leaking, but preserved in the tunnel -> Returned to the retailer (20170425) -> '''Renewed''' one delivered in Kamioka (20170714) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3139|IFI]] (20170721) ||
||0002 ||''Not exists'' ||
||0003 ||''Not exists'' ||
||0004 ||''Not exists'' ||
||0005 ||Leaking, get back to the retailer (20170130) -> '''Renewed''' one delivered in Kamioka (20170601) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2852|MCF]] (20170605) [No leak detected on 20170725] ||
||0006 ||Leaking, get back to the retailer (20170130) -> '''Renewed''' one delivered in Kamioka (20170601) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2852|MCF]] (20170605) [No leak detected on 20170725] ||
||0007 ||Leaking, but preserved in the tunnel -> Get back to the retailer (20170425)  -> '''Renewed''' one delivered in Kamioka (20170821)||
||0008 ||Leaking; was once installed '''IXC''', returned in advanced, and checked at the company  -> '''Renewed''' one delivered in Kamioka (20170601) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2852|MCE]] (20170605) [No leak detected on 20170725] ||
||0009 ||No leak; stocked at the side of IMC -> Returned to the retailer (20170718) -> '''Renewed''' one delivered in Kamioka (20171003) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3458|PRM]] (20171004) ||
||0010 ||No leak; stocked at the side of IMC -> Returned to the retailer (20170718) -> '''Renewed''' one delivered in Kamioka (20171003) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3458|PRM]] (20171004)||
||0011 ||No leak; stocked at the side of IMC -> Returned to the retailer (20170718) -> '''Renewed''' one delivered in Kamioka (20171003) ||
||0012 ||No leak; stocked at the side of IMC -> Returned to the retailer (20170718) -> '''Renewed''' one delivered in Kamioka (20171003) ||
||0013 ||No leak; stocked at the side of IMC  Returned to the retailer (20170718) -> '''Renewed''' one delivered in Kamioka (20171003) ||
||0014 ||Not yet checked; was once installed '''EXA''', preserved at the side of IMC -> Returned to the retailer (20170425) -> '''Renewed''' one delivered in Kamioka (20170821)||
||0015 ||Not yet checked; was once installed '''EXA''', preserved at the side of IMC -> Returned to the retailer (20170425) -> '''Renewed''' one delivered in Kamioka (20170821)||
||0016 ||Leaking, get back to the retailer (20170130)  -> '''Renewed''' one delivered in Kamioka (20170601) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2852|MCE]] (20170605) [No leak detected on 20170725] ||
||0017 ||Not yet checked nor opened; preserved at the side of IMC -> Returned to the retailer (20170425) -> '''Renewed''' one delivered in Kamioka (20170821)||
||0018 ||Leaking, get back to the retailer (20170130)  -> '''Renewed''' one delivered in Kamioka (20170601) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3150|PR2]] (20170725) ||
||0019 ||'''MCE''', Leaking (20170303) -> Returned to the retailer (20170606)-> '''Renewed''' one delivered in Kamioka (20171003) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5598|SR3]] (20180724) ||
||0020 ||'''MCF''', Leaking (20170303) -> Returned to the retailer (20170606)-> '''Renewed''' one delivered in Kamioka (20171003)-> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5598|SR3]] (20180724)   ||
||0021 ||'''PR3''', Not yet checked. -> Returned to the retailer (20170726)-> '''Renewed''' one delivered in Kamioka (20171003)  ||
||0022 ||'''MCE''', No Leak detected (20170303) -> Returned to the retailer (20170606)-> '''Renewed''' one delivered in Kamioka (20171003)  ||
||0023 ||Preserved in a desiccator at PSL room, for some reasons, not yet checked. -> Returned to the retailer (20170425)-> '''Renewed''' one delivered in Kamioka (20170821) ||
||0024 ||'''MCF''', No Leak detected (20170303) -> Returned to the retailer (20170606) -> '''Renewed''' one delivered in Kamioka (20171003) ||
||0025 ||Not yet checked; was once '''EYA'''; preserved at the side of IMC. -> Returned to the retailer (20170425) -> '''Renewed''' one delivered in Kamioka (20170821)||
||0026 ||'''BS''', not yet checked. -> Returned to the retailer (20170726)  -> '''Renewed''' one delivered in Kamioka (20171113) ||
||0027 ||'''BS''', not yet checked. -> Returned to the retailer (20170726)  -> '''Renewed''' one delivered in Kamioka (20171113) ||
||0028 ||Leaking; was once installed '''EYC''' probably, returned in advanced, and checked at the company-> '''Renewed''' one delivered in Kamioka (20171003)  ||
||0029 ||Not yet checked; was once '''EYA'''; preserved at the side of IMC.-> temporally Installed at PR2? for checking oplev.?? -> Returned to the retailer (20170726) -> '''Renewed''' one delivered in Kamioka (20171113) ||
||0030 ||Leaking, get back to the retailer (20170130)  -> '''Renewed''' one delivered in Kamioka (20170601)  -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3101|EYC]] (20170714 and see [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3099|here]]) ||
||0031 ||Reverse pressured.  -> '''Renewed''' one delivered in Kamioka (20170601) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3101|EYC]] ( 20170714 and see [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3099|here]]) ||
||0032 ||Leaking, get back to the retailer (20170130)  -> '''Renewed''' one delivered in Kamioka (20170601) ||
||0033 ||Leaking, get back to the retailer (20170130) -> '''Renewed''' one delivered in Kamioka (20170630) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3143|BS]] (20170724) ||
||0034 ||Leaking, get back to the retailer (20170130) -> '''Renewed''' one delivered in Kamioka (20170630) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3143|BS]] (20170724) ||
||0035 ||Leaking; was once installed '''EYC''' probably, returned in advanced, and checked at the company -> '''Renewed''' one delivered in Kamioka (20170630) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3151|IMM]] (20170725) ||
||0036 ||Leaking, get back to the retailer (20170130) -> '''Renewed''' one delivered in Kamioka (20170630) ||
||0037 ||Leaking, get back to the retailer (20170130) -> '''Renewed''' one delivered in Kamioka (20170630) ||
||0038 ||Reverse pressured.  -> '''Renewed''' one delivered in Kamioka (20170714) ||
||0039 ||'''''Break''''' by reverse pressure (see an attached picture of an e-mail to me from Uchiyama-san on 14 Mar 2016) ||
||0040 ||Leaking, get back to the retailer (20170130)  -> '''Renewed''' one delivered in Kamioka (20170714) ||
||0041 ||'''IMM''', not yet checked. -> Returned to the retailer (20170726) -> '''Renewed''' one delivered in Kamioka (20171113) ||
||0042 ||Reverse pressured.  -> '''Renewed''' one delivered in Kamioka (20170714) ||




==== VPZ38Q (ICF70) : Technoport ====
||Serial# ||Status ||
||001 ||Leaking; was once installed '''IXA''' -> Returned to the retailer (20170606) -> '''Renewed''' one delivered in Kamioka (20170714) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5256|IXA]] (20180612)||
||002 ||Leaking; was once installed '''IXA''' -> Returned to the retailer (20170606) -> '''Renewed''' one delivered in Kamioka (20170714) ||
||003 ||'''PR3''', not yet checked.-> Returned to the retailer (20170726) [and will be stocked in the retailer.] ||
||004 ||Leaking, in the manufacture  -> '''Renewed''' one delivered in Kamioka (20170714) ||
||005 ||Leaking, in the manufacture -> '''Renewed''' one delivered in Kamioka (20170601) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3094|EYA]] (20170713) ||
||006 ||Leaking, in the manufacture -> '''Renewed''' one delivered in Kamioka (20170601) -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3094|EYA]] (20170713) ||
||007 ||Leaking, but preserved in the tunnel; was once installed '''EYA''', and leak detected -> Returned to the retailer (20170606) -> '''Renewed''' one delivered in Kamioka (20170714) ||
||008 ||Leaking, but preserved in the tunnel; was once installed '''EYA''', and leak detected -> Returned to the retailer (20170606) -> '''Renewed''' one delivered in Kamioka (20170714) ||
||009 ||Leaking, in the manufacture -> '''Renewed''' one delivered in Kamioka (20170601) ||
||010 ||No leak ''probably''; stocked at the side of IMC. -> Returned to the retailer (20170606) -> '''Renewed''' one delivered in Kamioka (20170714) ||
||011 ||Newly '''Renewed''' one, based on a stocked one in the retailer, delivered in Kamioka (20170714)  -> Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3140|PR3]] (20170721) ||

=== FY2017 version ===
Once delivered in the end of December 2016, but their quality are [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2448|out of question]], and with unbelievable delay the company will finally seriously deliver (hopefully) new ones. Firstly those viewport windows were newly ordered for cryostats according to CRY's new demands in FY2016, but, due to the delay described above, usable ones are not in time delivered, so two companies oplev ICF152 viewport windows would be mixedly exiting, which I would like to totally avoid from the viewpoints of engineering management. 

Anyway, they have been delivered and stocked in a shelf at the side of the IMC duct; see [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3645|this]].

In total 20 pcs of ICF152.
[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4056]]
[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4070]]
||Serial# ||Status ||
||01 ||xxxx ||
||02 ||Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4694|EXC]] (20180412) ||
||03 ||xxxx ||
||04 ||xxxx ||
||05 ||xxxx ||
||06 ||xxxx ||
||07 ||xxxx ||
||08 ||xxxx ||
||09 ||xxxx ||
||10 ||xxxx ||
||11 ||xxxx ||
||12 ||xxxx ||
||13 ||xxxx ||
||14 ||Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4550|EXC]] (20180322)||
||15 ||xxxx ||
||16 ||xxxx ||
||17 ||Installed at [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4550|EXC]] (20180322)||
||18 ||xxxx ||
||19 ||xxxx ||
||20 ||xxxx ||