the days of omation. Ou omatic. As
eral progra erimental erimental d ycling, etc.
our NMR e paratus memade 5-A e 5-Axis D
sists of a po motor drive
mposed of 5 dth Modulat
echnical dif t, so the PW WM is a we trol system
two ports trument’s d nal to 24 d
responding ruments, su
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designs
graduate st ur ultimate a matter o ams and ap research a data acquisi
The follow experiments
Axis DC mo DC motor d
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digital high program w pparatus for and the e ition, liquid
ing is the li .
otor drive drive is com
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ICs, so it ca ique, we ca
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eedle valve,
paratus
rimary wor make all th already hav r my maste
experiment d helium co
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mputer-con otor control C motors. T an drive 5 D an even dec control the m
and solves ring techno ridge circuit can move ontroller, U ut, we can h Labview.
, variable ca
and pro
rk is dedica he NMR ex ve some ac er study. A al equipm ompression, atus and rel
trolled by module. I u The motor c DC motors.
cide the mot motor’s driv this problem ology and w t IC, and we
and stop r USB-6501,
control ou The motor apacitors, v
ograms
ating to dev xperimental chievements All of them ment operat , helium ga lated progra
our Labvie utilize SANY
control mod By the bas tor’s rotatio ving voltage m successfu widely use e can direct ight away.
which con ur motor d drive contr acuum Reg
s
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ation, such as recovery
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drive throug rols lots of gulator, etc.
atory
Hel We recy volu The Nat inte
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g volume de er level swit m is compo
or. When th rol the inle ument’s La
etector tch as the h sed of seve he gas bag et and outle abview prog
helium gas eral parts.
is full, the et of the ga
gram on P
bag volume One of the detector wi as bag. All
C, and it c
e detector. T em is the h
ill close the the operat controllable
The helium helium gas e electric va tion is done e remotely
m gas bag alve.
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ure sensor p ich can ac troller (PID dely used in controller. A asured proce
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nd Lakesho determines
system system of t which are a e. The temp ports and tw
curately co D controller) n industrial A PID contr ess variable
adjusting th rlying proc mance, the nature of t e specific sy QR probe’s re 336 cont the final te
the nuclear a liquid nitro perature co wo heater ou
ontrol the t ) is a gener l control sy roller calcul
and a desir the process cess, PID c
PID param the system ystem. The
position. T trols the hea emperature
quadrupole ogen Dewa ontroller is utput. Lake temperature ric control
stems – a P lates an "err red setpoint.
s control in controllers meters used – while t length of t The position
ating rate. T . Both of
e resonance r, a tempera Lakeshore shore 336 u e. A propo
loop feedba PID is the m ror" value a . The contro nputs. In t are the b in the calcu he design the motion n of the pro The balance
them have
e experimen ature contro
336 contai utilizes the ortional inte ack mechan most comm as the differ oller attemp the absence best control
ulation mus is generic, stage is 70 obe decides e of heating e correspon
nt is
Rem
motely contr e evaporativ igning a DC
control it eriments. T uid continuo aporative co used to mak uid also falls 9, vacuum r mperature of
can change motor, whi motely.
rol Evapora ve cooling s C motor an t remotely.
The vapor ab ously evapo ooling of or ke cryocool s, and cooli regulator, as f our NMR e the temper ich is contr
ative cooling system is se nd a connec
. Evaporati bove a reser orates as lo rdinary heliu
ers. As the ing become s our pump experiment rature throu olled by the
g system et up by Pr cting device ive cooling rvoir of cryo ong as the l
um can coo temperatur s less effect ping rate co . With the t ugh changin e PC progra
rofessor Ben e on the vac g is comm ogenic liqui liquid's vap ol to at least re decreases
tive. We uti ontroller so
temperature ng the vacuu am. So we
n-Li Young cuum regul monly used id is pumpe por pressure
t 1.2K. This s, the vapor ilize LJ-eng that we ca e controller um regulato can do all t
g. What I d lator so tha d in cryog ed away, and
e is signific s technique r pressure o gineering m an dominate
Lakeshore or rotated by
the experim did is
Lab DC The of t reco Inst
bview Progr motor cont e DC motor
the motor.
ord its pos trument’s La
rams troller
controller u The progra sition at t abview, a vi
utilizes the am can mak the same t
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nique, whic tor move fo
program nguage.
ch controls t orward and is written
the rotary sp d backward with Nati
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Hew network ana works, espe
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network an alyzer is a ecially those
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analyzer esonance fr
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rcuit.
trical ssion
CS4 The NM the mag coil field by Lab
4 Supercond e CS4 contr MR experime
operation e gnetic and th l. The CS4
d. It’s conne the official bview, a visu
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gnet Power power supp ogram is ha e turn on th upply, it wil can safely tu
computer w d list. The mming langu
Supply ply controlli
as several se the heater w
ll cause dam une the pow with the GP
program is uage.
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s written w
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f the from n the
netic netic done ent’s
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gram so tha nitor LM50 done by th trument’s L a and plottin ium.
level monit has two Li ar, Janis, an at I can read
0 is connec he official Labview, a v
ng the liquid
tor-LM500 iquid helium nd the other d the level o cted to the c command visual progr
d helium le
m level mo r is for the of liquid hel computer w d list. The
ramming la evel showing
onitor, one Liquid Heli lium remote ith RS232 i program anguage. It
g the trend
is for the s ium contain ely. The liqu interface. A is written has the fun of the consu
superconduc ner. I wrote uid helium l All the opera with Nati nction of sa uming of li
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us. By app ditionally, it stops compr ual program
compressor eriment con ill be recyc gaseous hel propriate pa t also has th ressing. The mming langu
r, LHeP12 nsumes a la cled to the lium into li arameters, t he saving da e program i uage.
arge amoun e recycling
iquid state.
the compre ata function is written w
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helium, so t Then the c ram monito work in the n record the
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nd less time also use th t like other mperature-tim
s program guage.
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akeshore 33 er, Lakesho am can cho cessary para
choose the ed to autom ur controlle mode, whet ogram has m showing th
with Nation 6
ore 336, is oose the con ameters for
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temperature The intelli llect PID pa
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on of savin the changin ent’s Labvi
with four i channel an e. While sel gent auto-tu arameters, w ucting exper
e or purely ng data an ng rate of th
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inputs and nd heater ou lecting the r uning featur which make riments. Bu y manual m nd drawing the tempera al programm
two
Tem Mos The has is w
mperature co stly same a e difference one heater written with
ontroller-La as Lakeshor between th out and the National In
akeshore 33 re 336, the hese two tem
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program o mperature co
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Reference
Ch1. Introduction
1. Yoichi Kamihara et al.,” Iron-Based Layered Superconductor: LaOFeP”, Journal of the American Chemical Society, 128(31), pp.10012-10013, July 2006.
2. Yoichi Kamihara et al.,” Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 K”, Journal of the American Chemical Society, 128(31), pp.3296-3297, February 2008.
3. Marianne Rotter et al.,” Superconductivity at 38 K in the Iron Arsenide (Ba1-xKx)Fe2As2 ”,Physical Review Letters,101,107006,September 2008.
4. Joshua H. Tapp et al.,” LiFeAs: An intrinsic FeAs-based superconductor with Tc=18K”, Physical Review B, 78, 060505, August 2008.
5. F.C. Hsu et al.,” Superconductivity in the PbO-type structure alpha-FeSe”, PNAS, 105, pp.14262-14264, September 2008.
6. S. Medvedev et al., Nature Materials 8, 630 (2009) 7. S. Margadonna et al., Chem. Commun. p.5607 (2008) 8. A. Subedi et al., Phys. Rev. B 78, 134514 (2008) 9. M. V. Sadovskii, Phys.-Usp. 51, 1201 (2008) 10. M. H. Fang et al., Phys. Rev. B 78, 224503 (2008) 11. T. Imai et al., Phys. Rev. Lett. 102, 177005 (2009) 12. S. Masaki et al., J. Phys. Soc. Jpn. 78, 063704 (2009) 13. Y. Mizuguchi et al., Appl. Phys. Lett. 93, 152505 (2008) 14. T. M. McQueen et al., Phys. Rev. B 79, 014522 (2009) 15. T. Huang et al., arXiv:0907.4001 (unpublished)
16. A. J. Williams et al., J. Phys.: Condens. Matter 21, 305701 (2009)