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No.	： 245
Title	： Re: SAD Update V1.1.0.5k64 A bug in Emittance[]/EMIT.
Date	： 2017/04/13(Thu) 11:32:59
Name	： Akio Morita
URL	：

> 1. A bug was found in emittance calculation (trade.f) by our Chinese colleagues in IHEP. The radiation damping matrix was wrong for dU/dy. This bug was created by
> V1.0.10.4a06 in Jan. 2010, even before k64. This affects all magnets
> when d(v \times B)/dy, or d(v \times B)/dx for MULT or QUAD within SOL
> with K1<0, are nonzero. QUADs outside of SOL are OK. This bug only
> affects EMIT/Emittance[] and has no direct effects on tracking/CALC/GO.
>
修正したradi(6.3)の項がradi(6.1)の項と同一スカラ起源の微分だとすると、
符号間違いの表式が最初に現れたのは、src/trade.f revision 1.20では無く
revision 1.13(2009.12.06 02:36:18 UTC/V1.0.10.3.9a01)と思われます

また、SOL領域外のQUADでもあってもoffaxisビームの場合は、影響があるケースが
存在できるように見えます

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SAD Update V1.1.0.5k64 A bug in Emittance[]/EMIT.

K. Oide

No.237

Re: SAD Update V1.1.0.5k64 A bug in Emittance[]/EMIT. - K. Oide 17/04/11-15:54 No.241
Re: SAD Update V1.1.0.5k64 A bug in Emittance[]/EMIT. - Akio Morita 17/04/13-11:32 No.245
SAD Update V1.1.0.6k64 Several bug fixes. - K. Oide 17/05/02-21:43 No.283
- Re: SAD Update V1.1.0.6k64 Several bug fixes. - K. Oide 17/05/06-21:23 No.293

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> > 1. A bug was found in emittance calculation (trade.f) by our Chinese colleagues in IHEP. The radiation damping matrix was wrong for dU/dy. This bug was created by > > V1.0.10.4a06 in Jan. 2010, even before k64. This affects all magnets > > when d(v \times B)/dy, or d(v \times B)/dx for MULT or QUAD within SOL > > with K1<0, are nonzero. QUADs outside of SOL are OK. This bug only > > affects EMIT/Emittance[] and has no direct effects on tracking/CALC/GO. > > > 修正したradi(6.3)の項がradi(6.1)の項と同一スカラ起源の微分だとすると、 > 符号間違いの表式が最初に現れたのは、src/trade.f revision 1.20では無く > revision 1.13(2009.12.06 02:36:18 UTC/V1.0.10.3.9a01)と思われます > > また、SOL領域外のQUADでもあってもoffaxisビームの場合は、影響があるケースが > 存在できるように見えます
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Message > > 1. A bug was found in emittance calculation (trade.f) by our Chinese colleagues in IHEP. The radiation damping matrix was wrong for dU/dy. This bug was created by > > V1.0.10.4a06 in Jan. 2010, even before k64. This affects all magnets > > when d(v \times B)/dy, or d(v \times B)/dx for MULT or QUAD within SOL > > with K1<0, are nonzero. QUADs outside of SOL are OK. This bug only > > affects EMIT/Emittance[] and has no direct effects on tracking/CALC/GO. > > > 修正したradi(6.3)の項がradi(6.1)の項と同一スカラ起源の微分だとすると、 > 符号間違いの表式が最初に現れたのは、src/trade.f revision 1.20では無く > revision 1.13(2009.12.06 02:36:18 UTC/V1.0.10.3.9a01)と思われます > > また、SOL領域外のQUADでもあってもoffaxisビームの場合は、影響があるケースが > 存在できるように見えます
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